1912-13.] 
Obituary Notices. 
333 
OBITUARY NOTICES. 
John M‘ Arthur, F.C.S. 
(Read January 20, 1913.) 
John M‘Arthur, F.C.S., received his chemical training at Anderson’s 
College, Glasgow (now the Royal Technical College), under Dr Win. Dittimar, 
F.R.S., to whom he acted for several years as chief assistant. In recogni- 
tion of their joint researches on the Atomic Weight of Platinum, on the 
Determination of Potash in Sea Water, and elaborate investigations of 
samples brought back from the voyages of H.M.S. Challenger, he was 
elected to the Fellowship of the Royal Society of Edinburgh in 1888. 
Entering the Battersea works of Price’s Patent Candle Co., Ltd., in 
1887, under the late John Calderwood, F.R.S., he remained as chief 
chemist, general technical manager, and technical adviser for over twenty- 
five years. 
Although he had been in less robust health for the past five years, his 
sudden decease on 19th December 1912 was quite unexpected. 
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