Wilbert Smith Archives Files Box 1131 19 1131-19-p248

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SPECTROGRAPHIC LABORATORY MINES BRANCH, OTTAWA, CANADA SEMI-QUANTITATIVE SPECTROGRAPHIC ANALYSIS we | | ce Ni | Sn | Cr] a1] V | i "the seai-quantitative spectrographic method, because it is designed to handle a very wide variety of materials, ean in consequence only furnish approximate results indicating order of magnitude. These results are not, in general, suitable as a basis of major policy decisions or actions, and where results are for important policy purposes, fl titative estimations,...