✍ Scribed by Coed, John W.
No coin nor oath required. For personal study only.
COBB-SYNTHESIS OF A GLAZE, GLASS OR OTHER COMPLEX SILICATE. 709 for putting within their reach a simple method which might, at any rate. be uscd for control cxpcrimenta.
JIr. J. GOLDEW Raid that Prof. Grcto had e h o m him tho rolumctric method for the estimution of phosphoric ncid rcfcrrwl to by Mr. Willtie, nnd he felt bound to euy what n very ncrurntB nnd rapid method it was in Prof. Grete's hands. Spcnltin as nn agricultural nnnlyst under the Fertilkers an# Feeding Stuffs Act,, all these rapid mcthods were cloeed to him, nu thc Bonrd of Agriculturc nnd Fisheries hod fixed officinl mcthods by which phosphates were to he determined under the Act. For phosphoric ncid in milk nah he had tried the Emmcrling method mentioncd as uscd by Dohcrty and published in the AndyRt (vol. 33, p. 273). For rnpidity this lcft nothing to be desired and tlie resiilta wcro very fairly in agreement with grnvimetric determinations. '
ah. W'ILKKE. in rcplv, snit1 it was bccnuRe of the cxccedingly time-conmning nature of the usunl methods for thc dcterniinntion of phosphoric arid that he was lcd to investigntc the matter. Hc considcrcd that in tlic post justicc hail not been donc to the silver method, which, in the absence of nluminiiim nnd iron, w w highlv accurato when properly applied, The constancy of co'mposition of thc silver phosphnte wns nn important fenturc of the modifird E m m c r h g mctliocl he hnd worked out.
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