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made analysis of our phenol and determine possible impurities so that in the mean time our men be able to give their attention to other experiments. A very busy strenuous day. Took supper at University Club. Pupin there.
Feb 13. It occured to me yesterday that [[red underline]] rapid change of [[/red underline]] temperature while plunging the bits in hot alkaline water to eliminate adhering oil, [[red underline]] then in cold water may have added to our troubles So today recommended Rossi to [[strikethrough]] ceas [[/strikethrough]] eliminate this treatment in the future. [[/red underline]] samples made with increased amount of phenol (120 instead of 100) seem much better and good
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Also notice that [[red underline]] defective [[/red underline]] [[strikethrough]] stick [[/strikethrough]] bits [[red underline]] stands very well acetone, [[/red underline]] while old excellent material disintegrates showing probably more uncombined phenol. So everything seems to point [[strikethrough]] that [[/strikethrough]] to theory that more thorough combination has given a material of [[red underline]] greater hardness but less plasticity have greater tendency to crack. [[/red underline]] It is not due to defective sulphite because we have doubled, tripled and quadrupled sulphite with no improvement while reduction of sulphite to 50% gave reddish product After lunch, long conference between [[red underline]] Swan, May MacDonald and Rossi [[/red underline]] in regard to complaints of defective material. (molding mixtures) delivered