Late 1960's early 1970's image of p[eole working with mainframe computer. Via LOC. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

The Human Fly. Man balancing atop a flagpole. Flagpole sitta if you like. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

WPA poster. Scan of 2 d image in the public domain believed to be free to use without restriction in the US.

German stamp art; modern. Scan of 2 d image in the public domain believed to be free to use without restriction in the US.

German stamp art; modern. Scan of 2 d image in the public domain believed to be free to use without restriction in the US.

German stamp art; meterology. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

German stamp art; modern. Scan of 2 d image in the public domain believed to be free to use without restriction in the US.

German stamp art; modern. Scan of 2 d image in the public domain believed to be free to use without restriction in the US.

German stamp art; modern. Scan of 2 d image in the public domain believed to be free to use without restriction in the US.

German stamp art; modern. Scan of 2 d image in the public domain believed to be free to use without restriction in the US.

German stamp art; modern. Scan of 2 d image in the public domain believed to be free to use without restriction in the US.

Stamp art; Sun corona against royal blue. Scan of 2 d image in the public domain believed to be free to use without restriction in the US.

Russian stamp art, science fiction and space series 1967. Scan of 2 d image in the public domain believed to be free to use without restriction in the US.

Russian stamp art, science fiction and space series 1967. Scan of 2 d image in the public domain believed to be free to use without restriction in the US.

Effects of quality of surface and color upon absorption of light (1907)
Thesis (B.S.)--Armour Institute of Technology, 1907
B.S. in Electrical Engineering, 1907. Scans of 2 d images in the public domain believed to be free to use without restriction in the US.

Effects of quality of surface and color upon absorption of light (1907)
Thesis (B.S.)--Armour Institute of Technology, 1907
B.S. in Electrical Engineering, 1907. Scans of 2 d images in the public domain believed to be free to use without restriction in the US.

Effects of quality of surface and color upon absorption of light (1907)
Thesis (B.S.)--Armour Institute of Technology, 1907
B.S. in Electrical Engineering, 1907. Scans of 2 d images in the public domain believed to be free to use without restriction in the US.

Effects of quality of surface and color upon absorption of light (1907)
Thesis (B.S.)--Armour Institute of Technology, 1907
B.S. in Electrical Engineering, 1907. Scans of 2 d images in the public domain believed to be free to use without restriction in the US.

Effects of quality of surface and color upon absorption of light (1907)
Thesis (B.S.)--Armour Institute of Technology, 1907
B.S. in Electrical Engineering, 1907. Scans of 2 d images in the public domain believed to be free to use without restriction in the US.

Effects of quality of surface and color upon absorption of light (1907)
Thesis (B.S.)--Armour Institute of Technology, 1907
B.S. in Electrical Engineering, 1907. Scans of 2 d images in the public domain believed to be free to use without restriction in the US.

Effects of quality of surface and color upon absorption of light (1907)
Thesis (B.S.)--Armour Institute of Technology, 1907
B.S. in Electrical Engineering, 1907. Scans of 2 d images in the public domain believed to be free to use without restriction in the US.

Effects of quality of surface and color upon absorption of light (1907)
Thesis (B.S.)--Armour Institute of Technology, 1907
B.S. in Electrical Engineering, 1907. Scans of 2 d images in the public domain believed to be free to use without restriction in the US.

Effects of quality of surface and color upon absorption of light (1907)
Thesis (B.S.)--Armour Institute of Technology, 1907
B.S. in Electrical Engineering, 1907. Scans of 2 d images in the public domain believed to be free to use without restriction in the US.

Effects of quality of surface and color upon absorption of light (1907)
Thesis (B.S.)--Armour Institute of Technology, 1907
B.S. in Electrical Engineering, 1907. Scans of 2 d images in the public domain believed to be free to use without restriction in the US.

Effects of quality of surface and color upon absorption of light (1907)
Thesis (B.S.)--Armour Institute of Technology, 1907
B.S. in Electrical Engineering, 1907. Scans of 2 d images in the public domain believed to be free to use without restriction in the US.

Effects of quality of surface and color upon absorption of light (1907)
Thesis (B.S.)--Armour Institute of Technology, 1907
B.S. in Electrical Engineering, 1907. Scans of 2 d images in the public domain believed to be free to use without restriction in the US.

The Aerial ship (1910). Scan of 2 d image in the public domain believed to be free to use without restriction in the US.

The Aerial ship (1910). Scan of 2 d image in the public domain believed to be free to use without restriction in the US.

Nothing is impossible. Embossed paper. Scan of 2 d image in the public domain believed to be free to use without restriction in the US

Drawing of a person with elaborate wings. Via Library of Congress. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Library of Congress. Scan of 2 d images in the public domain beleived to be free to use without restriction in the US.

Vintage French Advertising art. Flying machines, 19th Century. French advertisement; color illustration. Scan of 2 d image in the public domain believed to be free to use without restriction in the US.

Vintage French advertisement. Scan of 2 d image in the public domain believed to be free to use without restriction in the US.

Scan of 2-D images in the public domain believed to be free to use without restriction in the US.

Scan of 2-D images in the public domain believed to be free to use without restriction in the US.

Thomas Baldwin Airopaidia: containing the narrative of a balloon excursion from Chester, the eighth of September, 1785,, 1786 "Airopaidia: containing the narrative of a balloon excursion from Chester, the eighth of September, 1785, taken from minutes made during the voyage: hints on the improvement of balloons ... to which is subjoined mensuration of heights by the barometer, made plain; with extensive tables. The whole serving as an introduction to aërial navigation. With a copious index. / By Thomas Baldwin, Esq, A.M." Scan of 2-D images in the public domain believed to be free to use without restriction in the US.

Precious stones considered in their scientific and artistic relations. With a catalogue of the Townshend collection (1905). Scan of 2 d image in the public domain believed to be free to use without restriction in the US.

Youmans, Edward Livingston (1855) Chemical atlas. D. Appleton. Chemistry of combustion and illumination. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Youmans, Edward Livingston (1855) Chemical atlas. D. Appleton. Chemistry of geology. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Youmans, Edward Livingston (1855) Chemical atlas. D. Appleton. Compounds of salts. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Youmans, Edward Livingston (1855) Chemical atlas. D. Appleton. Examples of isomerism. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Youmans, Edward Livingston (1855) Chemical atlas. D. Appleton. Nitrogenized and sulpherized condition of food. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Youmans, Edward Livingston (1855) Chemical atlas. D. Appleton. Plants and Animals and the air. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Youmans, Edward Livingston (1855) Chemical atlas. D. Appleton. Decomposition of Light; structure of solar rays. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Youmans, Edward Livingston (1855) Chemical atlas. D. Appleton. Homologous compounds

Youmans, Edward Livingston (1855) Chemical atlas. D. Appleton. Illustration of the theory of compound radicals

Youmans, Edward Livingston (1855) Chemical atlas. D. Appleton. Metalloids and their compounds. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Youmans, Edward Livingston (1855) Chemical atlas. D. Appleton. Metals and their compounds with oxygen. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Youmans, Edward Livingston (1855) Chemical atlas. D. Appleton. Vinuous, lactic and butyric fermentation. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

The new household discoveries; an encyclopedia of recipes and processes (1917). Charts and analysis of what food is made of. Becky Home-ecky. Scans of 2 d images in the public domain believed to be free to use without restriction in the US.

The new household discoveries; an encyclopedia of recipes and processes (1917). Charts and analysis of what food is made of. Becky Home-ecky. Scans of 2 d images in the public domain believed to be free to use without restriction in the US.

The new household discoveries; an encyclopedia of recipes and processes (1917). Charts and analysis of what food is made of. Becky Home-ecky. Scans of 2 d images in the public domain believed to be free to use without restriction in the US.

The new household discoveries; an encyclopedia of recipes and processes (1917). Charts and analysis of what food is made of. Becky Home-ecky. Scans of 2 d images in the public domain believed to be free to use without restriction in the US.

The new household discoveries; an encyclopedia of recipes and processes (1917). Charts and analysis of what food is made of. Becky Home-ecky. Scans of 2 d images in the public domain believed to be free to use without restriction in the US.

The new household discoveries; an encyclopedia of recipes and processes (1917). Charts and analysis of what food is made of. Becky Home-ecky. Scans of 2 d images in the public domain believed to be free to use without restriction in the US.

The new household discoveries; an encyclopedia of recipes and processes (1917). Charts and analysis of what food is made of. Becky Home-ecky. Scans of 2 d images in the public domain believed to be free to use without restriction in the US.

The new household discoveries; an encyclopedia of recipes and processes (1917). Charts and analysis of what food is made of. Becky Home-ecky. Scans of 2 d images in the public domain believed to be free to use without restriction in the US.

The new household discoveries; an encyclopedia of recipes and processes (1917). Charts and analysis of what food is made of. Becky Home-ecky. Scans of 2 d images in the public domain believed to be free to use without restriction in the US.

The new household discoveries; an encyclopedia of recipes and processes (1917). Charts and analysis of what food is made of. Becky Home-ecky. Scans of 2 d images in the public domain believed to be free to use without restriction in the US.

The new household discoveries; an encyclopedia of recipes and processes (1917). Charts and analysis of what food is made of. Becky Home-ecky. Scans of 2 d images in the public domain believed to be free to use without restriction in the US.

The new household discoveries; an encyclopedia of recipes and processes (1917). Charts and analysis of what food is made of. Becky Home-ecky. Scans of 2 d images in the public domain believed to be free to use without restriction in the US.

The new household discoveries; an encyclopedia of recipes and processes (1917). Charts and analysis of what food is made of. Becky Home-ecky. Scans of 2 d images in the public domain believed to be free to use without restriction in the US.

The new household discoveries; an encyclopedia of recipes and processes (1917). Charts and analysis of what food is made of. Becky Home-ecky. Scans of 2 d images in the public domain believed to be free to use without restriction in the US.

Illustration of perspective -taking; Italian 18th Century. Elementi di prospettiva : per uso degli architetti, e pittori (1747). Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Illustration of perspective -taking; Italian 18th Century. Elementi di prospettiva : per uso degli architetti, e pittori (1747). Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Természetrajzi füzetek (1877). Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Illustration of perspective -taking; Italian 18th Century. Elementi di prospettiva : per uso degli architetti, e pittori (1747). Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Illustration of perspective -taking; Italian 18th Century. Elementi di prospettiva : per uso degli architetti, e pittori (1747). Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Illustration of perspective -taking; Italian 18th Century. Elementi di prospettiva : per uso degli architetti, e pittori (1747). Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Illustration of perspective -taking; Italian 18th Century. Elementi di prospettiva : per uso degli architetti, e pittori (1747). Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Mundus subterraneus, in XII libros digestus : qvo divinum subterrestris mundi opificium, mira ergasteriorum naturae in eo distributio, verbo [pantamorphon] Protei regnum, universae denique naturae majestas & divitiae summa rerum varietate exponuntur, abditorum effectuum causae acri indagine inquistae demonstrantur, cognitae per artis & naturae conjugium ad humanae vitae necessarium usum vario experimentorum apparata, necnon novo modo & ratione applicantur. Ad Alexandrum VII. pont. opt. max. (1678). Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Illustration of perspective -taking; Italian 18th Century. Elementi di prospettiva : per uso degli architetti, e pittori (1747). Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Illustration of perspective -taking; Italian 18th Century. Elementi di prospettiva : per uso degli architetti, e pittori (1747). Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Illustration of perspective -taking; Italian 18th Century. Elementi di prospettiva : per uso degli architetti, e pittori (1747). Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Illustration of perspective -taking; Italian 18th Century. Elementi di prospettiva : per uso degli architetti, e pittori (1747). Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Illustration of perspective -taking; Italian 18th Century. Elementi di prospettiva : per uso degli architetti, e pittori (1747). Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Illustration of perspective -taking; Italian 18th Century. Elementi di prospettiva : per uso degli architetti, e pittori (1747). Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Illustration of perspective -taking; Italian 18th Century. Elementi di prospettiva : per uso degli architetti, e pittori (1747). Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Illustration of perspective -taking; Italian 18th Century. Elementi di prospettiva : per uso degli architetti, e pittori (1747). Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Illustration of perspective -taking; Italian 18th Century. Elementi di prospettiva : per uso degli architetti, e pittori (1747). Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Traité de physique considérée dans ses rapports avec la chimie et les sciences naturelles (1842). Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Traité de physique considérée dans ses rapports avec la chimie et les sciences naturelles (1842). Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Diagram of acoustics. American edition of the British encyclopedia, or Dictionary of arts and sciences (1818). Scan of 2 d image in the public domain believed to be free to use without restriction in the US.

Diagram showing how far light shines from Penrith Beacon. Clarke, James, d. 1790.
A survey of the lakes of Cumberland, Westmorland, and Lancashire: together with an account, historical, topographical, and descriptive, of the adjacent country. To which is added, a sketch of the border laws and customs. By James Clarke ...
London, Printed for the author, 1789. Scan of 2 d image in the public domain believed to be free to use without restriction in the US.

Ibuprofen, chemical structure illustration. Scan of 2 d image in the public domain believed to be free to use without restriction in the US.

Graph of ocean sounding data, "Diagram of the Porcupine [ship] soundings in the Atlantic and in the Faeroe Channel, showing the relation between temperature and depth, - the serial soundings reduced to curves. . . "Scan of 2 d image in the public domain believed to be free to use without restriction in the US.

Table of perspective. Scans of 2 d images in the public domain believed to have no restrictions on use in the US.

Table of Geography and Hydrography, pertains to navigation. Scans of 2 d images in the public domain believed to have no restrictions on use in the US.

Scan of 2-D images in the public domain believed to be free to use without restriction in the US.

Mundus subterraneus, in XII libros digestus : qvo divinum subterrestris mundi opificium, mira ergasteriorum naturae in eo distributio, verbo [pantamorphon] Protei regnum, universae denique naturae majestas & divitiae summa rerum varietate exponuntur, abditorum effectuum causae acri indagine inquistae demonstrantur, cognitae per artis & naturae conjugium ad humanae vitae necessarium usum vario experimentorum apparata, necnon novo modo & ratione applicantur. Ad Alexandrum VII. pont. opt. max. (1678). Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Mundus subterraneus, in XII libros digestus : qvo divinum subterrestris mundi opificium, mira ergasteriorum naturae in eo distributio, verbo [pantamorphon] Protei regnum, universae denique naturae majestas & divitiae summa rerum varietate exponuntur, abditorum effectuum causae acri indagine inquistae demonstrantur, cognitae per artis & naturae conjugium ad humanae vitae necessarium usum vario experimentorum apparata, necnon novo modo & ratione applicantur. Ad Alexandrum VII. pont. opt. max. (1678). Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Mundus subterraneus, in XII libros digestus : qvo divinum subterrestris mundi opificium, mira ergasteriorum naturae in eo distributio, verbo [pantamorphon] Protei regnum, universae denique naturae majestas & divitiae summa rerum varietate exponuntur, abditorum effectuum causae acri indagine inquistae demonstrantur, cognitae per artis & naturae conjugium ad humanae vitae necessarium usum vario experimentorum apparata, necnon novo modo & ratione applicantur. Ad Alexandrum VII. pont. opt. max. (1678). Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Snow crystals. Scan of 2-D images in the public domain believed to be free to use without restriction in the US.Via National Oceanographic and Atmospheric Administration ("NOAA"):"Snow crystals as observed and drawn by William Scoresby. In An account of the Arctic regions with a history and description of the northern whale-fishery, by W. Scoresby. 1820."

Snow crystals. Scan of 2-D images in the public domain believed to be free to use without restriction in the US. Snow crystals. Scan of 2-D images in the public domain believed to be free to use without restriction in the US.Via National Oceanographic and Atmospheric Administration ("NOAA"):"Snow crystals as observed and drawn by William Scoresby. In An account of the Arctic regions with a history and description of the northern whale-fishery, by W. Scoresby. 1820."

Snow crystals. Scan of 2-D images in the public domain believed to be free to use without restriction in the US. Snow crystals. Scan of 2-D images in the public domain believed to be free to use without restriction in the US.Via National Oceanographic and Atmospheric Administration ("NOAA"):"Snow crystals as observed and drawn by William Scoresby. In An account of the Arctic regions with a history and description of the northern whale-fishery, by W. Scoresby. 1820."

Géométrie de position 1803 - Title Page. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Carnot, Position de Geometry 1802 - Title Page. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Carnot, Lazare (1803) Géométrie de position. chez J.B.M. Duprat. Title page. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Avogadro, Amedeo (1837) Fisica de' corpi ponderabili [Tome 1]. Stamperia reale. Title page. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Avogadro, Amedeo (1837) Fisica de' corpi ponderabili [Tome 1]. Stamperia reale. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Avogadro, Amedeo (1837) Fisica de' corpi ponderabili [Tome 1]. Stamperia reale. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Avogadro, Amedeo (1837) Fisica de' corpi ponderabili [Tome 1]. Stamperia reale. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Avogadro, Amedeo (1837) Fisica de' corpi ponderabili [Tome 1]. Stamperia reale. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Avogadro, Amedeo (1837) Fisica de' corpi ponderabili [Tome 1]. Stamperia reale. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Avogadro, Amedeo (1837) Fisica de' corpi ponderabili [Tome 1]. Stamperia reale. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Avogadro, Amedeo (1837) Fisica de' corpi ponderabili [Tome 1]. Stamperia reale. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Avogadro, Amedeo (1837) Fisica de' corpi ponderabili [Tome 1]. Stamperia reale. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Avogadro, Amedeo (1837) Fisica de' corpi ponderabili [Tome 1]. Stamperia reale. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Carnot, Lazare (1803) Géométrie de position. chez J.B.M. Duprat. Bisection of a sphere. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Carnot, Lazare (1803) Géométrie de position. chez J.B.M. Duprat. Irregular shapes. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Carnot, Lazare (1803) Géométrie de position. chez J.B.M. Duprat. Geometric shapes diagrammed. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Carnot, Lazare (1803) Géométrie de position. chez J.B.M. Duprat. Triangles and circles and more things. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Carnot, Lazare (1803) Géométrie de position. chez J.B.M. Duprat. Triangles and spheres. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Carnot, Lazare (1803) Géométrie de position. chez J.B.M. Duprat. Triangles. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Carnot, Lazare (1803) Géométrie de position. chez J.B.M. Duprat. Triangles, circles and things. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

1792 - Romé de l'Isle, Jean-Baptiste Louis de Manuel cristallographe. chez Bossange. Scan of 2 d images in the public domain believed to be free to use without restriction in the US.

Table of Trigonometry. Scans of 2 d images in the public domain believed to have no restrictions on use in the US.

Table of Optics. Scans of 2 d images in the public domain believed to have no restrictions on use in the US.

Table of Geometry. Scans of 2 d images in the public domain believed to have no restrictions on use in the US.

Luca Pacioli. Su[m]ma de arithmetica geometria proportioni [et] proportionalita, 10-20 Nov. 1494. Scan of 2 d image in the public domain believed to be free to use without restriction in the US

Scans of 2 d images in the public domain believed to be free to use with out restriction in the US.

Scans of 2 d images in the public domain believed to be free to use with out restriction in the US.

Scans of 2 d images in the public domain believed to be free to use with out restriction in the US.

Scans of 2 d images in the public domain believed to be free to use with out restriction in the US.

Scans of 2 d images in the public domain believed to be free to use with out restriction in the US.

Scans of 2 d images in the public domain believed to be free to use with out restriction in the US.

Scans of 2 d images in the public domain believed to be free to use with out restriction in the US.

Scan of 2 d images in the public domain believed to be free to use without restriction in the U.S.

Scans of 2 d images in the public domain believed to be free to use without restriction in the US.

Scan of 2-D images in the public domain believed to be free to use without restriction in the US.

Illustration of a Bubble. Scan of 2-D images in the public domain believed to be free to use without restriction in the US.

Illustration, moonlight spectrum. Scan of 2-D images in the public domain believed to be free to use without restriction in the US.

Diagram, moon between sun and Earth, showing effects on the tides. Scan of 2 d image in the public domain believed to be free to use without restriction in the US.

Panama Canal historical relic. Scan of 2-D images in the public domain believed to be free to use without restriction in the US.

Scan of 2-D images in the public domain believed to be free to use without restriction in the US.

Scan of 2-D images in the public domain believed to be free to use without restriction in the US.