One of Wilhelm Reich's Weather-Influencing Devices

William Murdoch's Locomotive Engine

James Watt's Improved Steam Engine of 1788

Watt's Steam Engine Circa 1765

Watt's Steam Engine Circa 1765

Herschel's Telescope

Leon Foucault's Telescope Constructed in Paris by Secretan

Wheeled Ladder for Scaling City Walls

Feminine Rubber Caps

Various Forms of Female Contraception: Diaphragm Occlusive Cap and Feminine Sheath

Various Forms of Female Contraception: Metal Caps and Studs

Diagram of the Metal Instrument Used for Inserting the Zephir Cap

Diagram to Show How the Matrisalus Cap is Held for Inserting into the Vagina

The Mensinga Occulsive Cap

An Alternative Method of Contraception

John Marshall's New Invented Double Microscope for Viewing the Circulation of the Blood

Cranionmeter Holds a Skull in Place

Water-Wheel and Bucket Pump

Diagram Showing the Use of a Steam Engine in a Coal Mine

Gin for Raising Coal from the Pit

Cog and Rung Mechanism for Raising Coal from the Pit

Otto Von Guericke's Pneumatic Pump

Newcomen Atmospheric Engine Modified by Richard Trevithick Senior at Bullan Garden Dolcoath in 1775

Newcomen's Atmospheric Engine at Pool Mine Cornwall

Possible Cure for Cancer

Earle's Medicine Bottle Which Comes with a Handy Spoon Compartment

Voltaic Pile, The First Workable Device for Generating a Consistent Flow of Electricity

Newcomen's Steam Engine

Aissieu Modern Essieu: Axle or Spindle

Machine for Raising Heavy Objects