September 1, 1915.] 



THE INDIA RUBBER WORLD 



645 



forms it into a brownish Mack substance, contracting on its 



surface with the appeara I Eusion. Ii is very unstabli and 



ma) best be preserved in a solution of common salt. Elementary 

 compi isition of gutta i < (udemans ' 



1. 



Carbon 87.64 



Hydrogen 11.79 



1 | nen 0.57 



sists diluti acids and alkaline liquids and is rapidly destroyed 



md nitric acids. Elementarj composition of llu- 



:,\ He i ( )udemans > 



1. 



Ca on '■ 



Hydrogen l117 



Oxygen M7 



2. 



11.42 



5.06 



100.00 100.00 100.00 

 orresponding Formula for gutta would be C M H ["he n 

 suit- of Oudemans regarding the elementary composition oi 



100.00 100.00 

 i , rresponding with the formula I H a O 



Ubam i a ,n showing under the micro- 



transparent radiating !! heavier than water. 



Gl'TTA Wam hoi 



,,„,,,„. and fluavile are confirmed bj Baumhauer and establish 

 the .pini-n that commercial gutta percha contains a hydro- 

 carbide, i ",.11 . mixed with different oxidation products. Dis- 

 tillation decomposes gutta in the same way as rubber. Pure 

 caoutchouc and pure gutta (the unoxidized part oi gutta perch - 

 „ lal be regarded as two isomeric compounds oi the same series. 

 Fluavile is a yellowish, transparent rosin, a little heavier than 

 water \t 32 degrees Fahrenheit it is hard and brittle, softening 

 at about 122 degrees, pasty at 140 degrees, and fluid at 212 to 

 »30 degrees Fahrenheit. It decomposes at higher temperatures. 

 !, is soluble in the cold in alcohol, ether, benzene, spirits of tur- 

 pentine, carbon disulphide and chloroform. On evaporation of 

 its solvents fluavile is deposited as an amorphous mass. It re- 



:. Rotterdam. 



melts at about 300 degrees Fahrenheit, and is not acted on by 



hydrochloric acid. It is soluble in benzene, spirits of turpentine. 



carbon disulphide, ether, chloroform and boiling absolute alcohol. 



[t ,,-,, ,u , out on cooling from its solutions. Elementary 

 ition of albane (Oudemans) : 1. 2. 



Carbon 78.87 78.95 



Hydrogen 10.58 10.31 



Oxygen -J^SS ^074 



100.00 100.00 

 i responding with the formula CH O,. By heating to 266 de- 

 grees Fahrenheit it is changed to I .11 ( > 

 (To be Continued.) 



