Lithography (from Ancient Greek λίθος, lithos ‘stone’, and γράφειν, graphein ‘to write’) is a method of printing originally based on the immiscibility of oil and water. The printing is from a stone (lithographic limestone) or a metal plate with a smooth surface.
invented by claude Chappe
Telegraphy is the long-distance transmission of messages where the sender uses…
invented by Geaorge Medhurst
An air compressor is a pneumatic device that converts power (using an electric…
invented by William Cullen
The term refrigeration means cooling a space, substance or system to lower…
invented by Eli Whitney
A cotton gin – meaning “cotton engine” – is a machine that…
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