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Skull anatomy by Leonardo da Vinci Featured those present Image

Skull anatomy by Leonardo da Vinci

Skull anatomy by Leonardo da Vinci. Historical artwork and notes on the anatomy of the human skull and teeth, by the Italian artist and scientist Leonardo da Vinci (1452-1519). This bisected skull shows the external structure (right), and dissected facial sinuses (left), the air-filled spaces inside the bones of the face. The diagram at lower left shows the teeth present in one half of the mouth: 4 incisors, 2 canines, 4 pre-molars, and 6 molars. Da Vinci was the first anatomist known to have correctly noted the number and root structure of human teeth. The notes are an example of his mirror writing, which was written backwards from right to left, and could be read in a mirror

© SHEILA TERRY/SCIENCE PHOTO LIBRARY

Caterpillar track steam engine by R. Hornsby & Sons Featured those present Image

Caterpillar track steam engine by R. Hornsby & Sons

The first and original Caterpillar or walking engine made by R. Hornsby & Sons of Grantham. R. Hornsby & Sons grew into a major manufacturer of agricultural machinery, at their Spittle Gate Works. The firm went on to produce steam engines used to drive threshing machines and other equipment such as traction engines; their portable steam engine was one of their most important products and the market leader. Later a chain-track was added to an oil-engined tractor: the caterpillar track; these were developed and patented by Hornsby's chief engineer (and managing director), David Roberts, from July 1904. These were first used on tractors which served with the British Army towing artillery from 1910, but were later fitted to tanks which were used in the First World War from 1916. In 1909, a development model called the Little Caterpillar was demonstrated to the War Office. The army officers present at the demonstration believed it would frighten the horses

© Mary Evans Picture Library 2015 - https://copyrighthub.org/s0/hub1/creation/maryevans/MaryEvansPictureID/10282530

Royal Naval College, Dartmouth EPW024215 Featured those present Image

Royal Naval College, Dartmouth EPW024215

ROYAL NAVAL COLLEGE, Dartmouth, Devon, photographed in 1928. This officer training college was purpose built on this site in 1905 to a design by Sir Aston Webb. The college originated in 1863 and had previously housed students in hulks moored on the River Dart. Cadets as young as 13 were trained here in naval skills and leadership. Graduates from Dartmouth provided much of the officer corps of the Royal Navy through both World Wars. The present Duke of Edinburgh, Prince of Wales and Duke of York all attended the college. Now known as the Britannia Royal Naval College, this building still provides a training base for naval officers of many foreign and commonwealth countries as well as the Royal Navy. Aerofilms Collection (see Links)

© Historic England