Guglielmo Marconi (Italian, 1874-1937). Wireless telegraph set including a transmitter, receiver, and American Bell headphones. With various label...

Ruhmkorff induction coil used to produce high-voltage pulses from a low-voltage direct current supply. This coil was the first type of electrical ...

Group of two antique brass microscopes, together with a collection of early slides. The box with slides has 12 removable slide drawers. There are ...

Antique brass binocular microscope by W. Sparrow, Eastbourne, UK, ca. late 19th c. With accessories and a custom wood box.Microscope; Height: 15 1...

Antique brass monocular microscope by Charles Collins (British, 1837-ca. 1915), UK, ca. 1870s. Engraved "C. Collins, Optician, 157 Gt. Portland St...

Stereo viewer or stereoscope. On an adjustable brass stand with scrolling decoration. With 16 early stereoview cards, depicting various scenes, in...

Adam Hilger Ltd., London, England. A large brass, steel, and wood quartz spectrograph camera.A spectrograph or spectroscope is used to obtain and ...

Adam Hilger Ltd., London, England. A large brass, steel, and wood quartz spectrograph camera. Numbered E.3.302 27318 along the brass scope. With a...

Adam Hilger Ltd., London, England. A large, straight, quartz spectrograph camera made of brass, steel, and wood. Numbered E.1306 25248 along the s...

Codman & Shurtleff Inc., United States. Donaldson Stereo-Camera. This camera, invented by David D. Donaldson, is used for taking close-up stereosc...

Zeiss Ikon, Germany. Microflex folding camera, ca. 1926. Fitted with a Carl Zeiss Jena Lens, number 949398.Height: 6 in x width: 7 1/2 in x depth:...

George Frick (American, 1793-1870), "A Treatise on the Diseases of the Eye including the Doctrines and Practice of the Most Eminent Modern Surgeon...

John Stephenson (British, 19th c.), "Medical Zoology and Mineralogy," London: John Churchill, 1838. Hand colored plates throughout.Height: 9 1/2 i...

Group of four books dating from 1896-1959 on optometry and vision including:W. Adams Frost, "The Fundus Oculi with an Ophthalmoscopic Atlas," Edin...

Rare early book of recipes with label reading "Private Recipes" on the cover. Inscription on inside page reads "Chicago 1860." Includes recipes fo...