CONTENTS. 



Part V. Infra-red Reflection Spectra. 



Page 



Chapter I 9 



Introduction 9 



Chapter II. Infra-red reflection spectra of various substances 10-20 



Carbonates 10-13 



Sulphides 13-15 



Oxides 15-17 



Aluminum silicates 18-20 



Chapter III. Minute examination of the reflection bands of quartz and of the 



carbonates 21-24 



Chapter IV. Reflection spectra in the extreme infra-red 25-34 



Apparatus and methods 26-28 



Residual rays from mica 29 



Residual rays from carbonates 29-31 



Residual rays from cryolite 3 Z ~3 2 



Residual rays from other minerals 32-34 



Chapter V. On regular and diffuse reflection 35~38 



Part VI. Infra-red Transmission Spectra. 



Chapter I 41-58 



Introduction 41 



Group I: Transmission spectra of various solids 4i~47 



Group II: Transmission spectra of various solutions 47-5 1 



Group III: Transmission spectra of colloidal metals 5153 



Group IV: Transmission spectra of colored glasses 54~58 



Chapter II. Effect of special groups of atoms on radiant energy 59~68 



Comparison of ultra-violet and infra-red 59 



The hydroxyl group 59~6o 



The effect of molecular weight of the maxima 60-64 



Characteristic bands of quartz and of silicates 65-68 



Part VII. Infra-red Emission Spectra. 



Chapter I 71-92 



Emission spectra of metals in hydrogen 71-72 



(a) Nickel arc in hydrogen 71 



(b) Spark spectra of metals in hydrogen 72 



Emission spectrum of the carbon arc 73 _ 78 



The investigations of Moll 76-78 



Radiation at room temperature 78-81 



Selective radiation from the Nernst glower 81-87 



Radiation from metal filaments , , , , , 8892 



3 





