Cyril P. Callister Cyril P. Callister Cyril Percy Callister (16 February 1893 – 5 October 1949) was an Australian chemist and food technologist who developed the Vegemite yeast spread. The son of a teacher and postmaster, and one of seven children, he attended the Ballarat School of Mines and later won a scholarship to the University of Melbourne. He gained a Bachelor of Science degree in 1914 and a Master of Science degree in 1917. In early 1915, Callister was employed by food manufacturer Lewis & Whitty, but later that year he enlisted in the Australian Imperial Force. After 53 days, however, he
British home army in the First World War reserve units in January 1915. For some artillery units, their first opportunity to practise with live ammunition did not come until January 1915. Rifle practice, already complicated by the variety of weapons issued to the territorials, suffered due to lack of rifles, practice ammunition and ranges on which to use them. Shortages and the competing demands of the rest of the British land forces meant that territorials often began their duties without the necessary equipment. Uniforms were in short supply, and insufficient transport resulted in a motley collection of carts, private vehicles and lorries being pressed into service. The regular