370 CLASSIFICATION OF EXPLOSIVES. 



(4) Here we may class the mixture of liquid nitric peroxide 

 with various oxidisable substances, such as carbon disulphide 

 or petroleum spirit. 



(5) The powders formed by the association of combustible 

 bodies with chlorates and perchlorates. 



(6) The powders formed by the association of combustible 

 bodies with various combustive bodies, such as potassium 

 bichromate, chromic acid, the oxides of copper, lead, antimony, 

 bismuth, etc. 



(7) To the mixtures of this group may be assimilated the 

 mixtures formed by the association of a sulphide, a metallic 

 phosphide or an analogous binary compounds with another metal 

 capable of displacing the former under the gaseous form 

 (mercury, for instance) with the liberation of heat. 



3. DIVISION otf THE THIRD BOOK. 



The variety of explosive mixtures thus practically created 

 with a view to their being applied is indefinite. Nevertheless 

 the number of the Usual Compounds is limited, and we will 

 designate the principal ones we intend to examine specially; 

 but first of allj in Chapter II. we shall present the general data 

 which it is necessary or useful to know in order to define the 

 manufacture and employment of a given explosive. 



Chapter III. will comjttise the study of explosive gases, 

 detonating gaseous mixtures, and analogous substances (groups 

 1 and 2). 



Chapter IV. is devoted to nOn-caYbonated explosive com- 

 pounds (3rd group). 



In Chapter V. we shall treat of nitric ethers properly so 

 called (4th group). 



The sequence of the substances belonging to this group is 

 studied in the following four chapters; which also comprise the 

 mixtures of the 5th, 6th, and 7th groups. The dynamites will 

 be examined in Chapter VI. 



Gun-cotton and allied bodies in Chapter VII. 



Picrates in Chapter VIII. 



Dinitro compounds in Chapter IX. 



Lastly the eighth group will be examined, viz. : Powders with 

 a nitrate base in Chapter X. ; 



Powders with a chlorate base in Chapter XI. 



And we shall conclude with some general considerations. 



