Wilbert Smith Archives Files Box 1131 19 1131-19-p249

Document Text (OCR)

SPECTROGRAPHIC LABORATORY MINES BRANCH, OTTAWA, CANADA. SEMI-QUANTITATIVE SPECTROGRAPHIC ANALYSIS ELEMENTs—Per cent Fe Mg | Ma | Cu Ni_|_ Sn Cr Al| V fo Co |_W Ti . "The semi-quantitative spectrographic method, because it is designed to handle a very wide variety of materials, can in B consequence only furnish approximate results indicating order of “e magnitude. These results are not, in general, suitable as a basis of major policy decisions or actions, and where results are required 1 for...