Receis ed September 22 1903 ' h E efforts of a committee of the S e w York Section of the Society of Chemical Industry, headed by Mr. Clifford Richardson, to improve the state of techiiical analysis in this country are doubtless known to many, if not most readers of this Journal. T h e subjects thus far taken up h a r e been Portland cement and copper slag analysis, the latter initiated by l f r , Thorn Smith, of Isabella, Tennessee. Carefully prepared samples were sent to many chemists and the tabulated results of analysis were handed over to me for examination and criticism. A report on each subject was rendered. The first, on Portland cement and raw limestone mixture, was published as a part of the Committee's report in the Jouriial of tlrc Society of Chctiiical Iiidzistrj. January I j , 1902.~ In the number of October 15, 1902, there is a criticism of 1 I n this connection a paragraph from a r e p x t "The Examination of Foods, Drugs and Public Water Supplies," from the laboratory of hygiene of the State of Kern Jersey, b y R. 0. Brooks, recently published, is most pertinent "Fifty-seven samples of what purported to be distilled water were received and analyzed. only twelve of which were pure and only twenty-two of which had any claim to the title 'distilled water.' The residues ranged from 260 parts(!) per million to 8 parts, sixteen being abore IOO ports and t h e average being 81 parts. All the samples with the exception of the aforementioned tweuty-two gave tests for either chlorides, sulphates, calcium salts, carbonates or metallic impurities, usually several of these being present in oue sample."
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