. Radiometric investigation of water of crystallization, light filters and standard absorption bands . • ( f ■itn H nun inn / . -i : . » :,....,v ■HI m ■. WASHINGTON GOVERNMENT PRINTING OFFICE 1911 RADIOMETRIC INVESTIGATION OF WATER OF CRYSTALLIZATION, LIGHT FILTERS, AND STANDARD ABSORPTION BANDS By W. W. Coblentz CONTENTS Page I. Introduction 619 II. The function of water in substances 621 III. The criterion used in the present method of analysis 625 IV. The least thickness of water detectable radiometrically 628 V. Apparatus and methods used 628 VI. Summary of previous data 629 VII. New expe
. Radiometric investigation of water of crystallization, light filters and standard absorption bands . • ( f ■itn H nun inn / . -i : . » :,....,v ■HI m ■. WASHINGTON GOVERNMENT PRINTING OFFICE 1911 RADIOMETRIC INVESTIGATION OF WATER OF CRYSTALLIZATION, LIGHT FILTERS, AND STANDARD ABSORPTION BANDS By W. W. Coblentz CONTENTS Page I. Introduction 619 II. The function of water in substances 621 III. The criterion used in the present method of analysis 625 IV. The least thickness of water detectable radiometrically 628 V. Apparatus and methods used 628 VI. Summary of previous data 629 VII. New experimental data: Group 1.—Minerals containing water of crystallization 630 Group 2.—Minerals containing water of constitution 643 Group 3.—Miscellaneous substances 646 VIII. Light-filters which absorb all the infra-red 655 IX. Spectral lines suitable for infra-red reference standards 661 I. INTRODUCTION Although investigations of infra-red absorption spectra werebegun about 25 years ago, it was not until the first years of thepresent century that an attempt was made to systematize the datapreviously obtained, and to publish it, as well as new dradi76196681911168168unse
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