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The Cabalistic analysis of the mind and the senses, 1617
 
Sectional view of a telegraph tower for Claude Chappe's semaphore, 1792, (c1870)
 
Claude Chappe demonstrating his optical telegraph (semaphore) system in 1793 (c1870)
 
Riot in Broad Street, London, 1780, (1790). Artist: James Heath
 
Execution of the Earl of Ferrers at Tyburn, Paddington, London, 1760
 
Men watching a cockfight, late 18th-early 19th century. Artist: Thomas Rowlandson
 
Antoine Laurent Lavoisier, 18th century French chemist, in his laboratory, 1814
 
John Law, Comptroller General of France, 1720 (1841)
 
John Bennett Lawes, English agriculturalist, 1882
 
John Bennett Lawes, English agriculturalist, 1882. Artist: Edward Linley Sambourne
 
Harry John Lawson, English inventor of a safety bicycle, 19th century
 
Isaac Lea, American publisher, geologist and conchologist, 1896
 
Frontispiece of Ontledigen en Ondekkigen...Brieven by Anton van Leeuwenhoek, 1686
 
Newcomen-type steam engine attributed to Jean-Rodolphe Perronet, 1767
 
Cross section of a Newcomen-type steam engine attributed to Jean-Rodolphe Perronet, 1767
 
Antoine Laurent Lavoisier, 18th century French chemist, 1801
 
Mining for rock salt, c1890
 
The solar spectrum, 1814
 
Justus von Liebig, German chemist, at work in his laboratory, mid 19th century (c1885)
 
Making Edison light bulbs, 1880
 
Cretin aged 15, c1890
 
Glass cutter decorating table ware on a carborundum wheel, 1867
 
Various pumps for draining ships, 1816
 
Various pumps for raising water, 1816
 
Boring wooden pipes, and casting and drawing iron pipes, c1825
 
The Wear above Sunderland Iron Bridge, c1829. Artist: R Francis
 
Villa Tournesol, 1899
 
Potato peeler, 1899
 
Using a laryngoscope to aid the removal of a polyp from the throat, c1890
 
Painting a wound with an antiseptic solution, c1890
 
Typical enlarged spleen of a Malaria patient, c1890
 
Hippolyte Fizeau, French physicist, 1870
 
Joseph von Fraunhofer, German physicist, c1895
 
Alexander von Humboldt, German naturalist, c1830. Artist: William Home Lizars
 
John Ross, British polar explorer and naval officer, 19th century
 
Christian Friedrich Schonbein, German chemist, c1898
 
Inclined plane powered by water wheel in used on a canal, 1796
 
Inclined planes for use on canals, 1796
 
Double inclined plane for moving tub boats from one level to another on a canal, 1796
 
Washing ore to extract gold, 1683
 
Furnace for processes where protracted heat required, such as cementation, 1580
 
Athanor or Slow Harry a self-feeding furnace maintaining a constant temperature, 1683
 
Athanor or Slow Harry a self-feeding furnace maintaining a constant temperature, 1683
 
Distillation of Nitric Acid, 1683
 
Laboratory for refining gold and silver, showing typical laboratory equipment, 1683
 
Production of saltpetre (nitre, potassium nitrate, or KN03), 1683
 
Checking the quality of saltpetre (nitre, potassium nitrate, or KN03), 1683
 
Crystallization of saltpetre (nitre, potassium nitrate, or KN03), 1683
 
Von Guericke's demonstration of the strength of a vacuum, 1654 (1672)
 
Experiment designed to show that air has weight, 1672
 
Von Guericke's demonstration of the power of air pressure, 1672
 
Pound lock, 1664
 
Roller bridge or inclined plane for transferring vessels from one level of a canal to another, 1737
 
Cashew nut - Anacardium occidentale, c1798
 
Richard Owen, British naturalist, c1856 (1891)
 
Joseph Louis Gay-Lussac, French chemist and physicist, c1860
 
Joseph Louis Gay-Lussac, French chemist and physicist, c1895
 
Joseph Louis Gay-Lussac, French chemist, physicist and balloonist, c1870
 
Experiment to calculate the speed of sound in air, Paris, 1822 (1873). Artist: Amedee Guillemin
 
Down House, near Beckenham, Kent, from the garden, 1883