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JACOBs STAFFA sailor uses a Jacobs Staff to calculate the angle between a star and the horizon
EINSTEIN, Albert (1879-1955). German physicist and mathematician, Nobel Prize in 1921. Formula to calculate the energy, of Albert
Calculating Horse Power / W H RobinsonCalculating the Horse Power of a sports car. Please note: Credit must appear as (c) Courtesy of the estate of Mrs J.C.Robinson/Pollinger Ltd/Mary Evans Picture Library
Astronomers Using Astrolabes Date: 1450
HOW MANY CHAIRS?A disgruntled looking woman wearing an enormous crinoline is asked by the chair proprietor how many chairs she is sitting on so that he can calculate her bill. Date: 1859
GUIDE TO MONEY 1723Title-page of Monsieur Barremes handy guide to money, helping traders to calculate prices in all currencies Date: 1723
SHOPPING GUIDETitle-page of Monsieur Barremes handy guide to money, helping traders to calculate prices in all currencies Date: 1723
FENG-SHUI COMPASSFENG-SHUI Fong-choei compass used by Chinese geomancers to calculate the most propitious location of buildings etc. Date: 1912
Form at a Glance. WW1, H. M. Bateman cartoon" Form at a Glance: THE VISITOR: Whats his trouble? THE ASYLUM DOCTOR: Oh; hes trying to calculate how many times " Form fours!" has been ordered since the war broke out
London (NFS) firefighter in breathing apparatus, WW2Side view of the Mark IV Proto (oxygen) breathing apparatus set, showing the re-breather bag, mouthpiece, control valves and cooler