6 CONTENTS. 



Page. 



Inks 41 



Writing inks 41 



Canceling inks having an oil base 44 



Rubber-stamp inks 48 



Materials used for the manufacture of canceling and other stamping inks. 49 



Typewriter ribbons and carbon papers 50 



Typewriter ribbons 50 



Carbon papers 52 



Miscellaneous 1 52 



Babbitt metal (rapid analysis) 52 



Glue i 54 



Glycerin 55 



Inking pads ^ 56 



Lubricating oils 57 



Phenolic disinfectant 59 



Pipe covering and cement 61 



Rubber 62 



Soap 64 



ILLUSTRATIONS. 



Page. 

 Fro. 1. Pyknometer for very fluid liquids 9 



2. Pyknometer for viscous liquids 9 



3. Machine for testing the life of typewriter ribbons ..<, 51 



