13 



tion or a condensation in different proportion.^, as a eonse- 



juencc of which the properties of the bodies entering the 

 compound arc lost, as it were, in those of the new body. We 

 think the intention of the author can be expressed with 

 sufficient exactitude by comparing such a compound to a 



tant of two or more forces or velocities. As a general 



rule the resultant will possess qualities which, though they are 



trnlv derived from the coin pound velocities in some definite 



ortion, are not necessarily their sum, except in a particular 



case. 



" \Vheii the identification or the condensation of matter does 

 ii"t take place at the expense of species already chemically 

 different, but exerts itself upon a single and similar species, 

 it produces a scries of new species, but these are not desi- 

 - compound but as allotropic bodies. The di\ 

 hysieal and chemical, which any given body can 

 whether gaseous, liquid or solid, arc dependent 



>rdinarily on the different degrees of condensation of a 



Nevertheless, there are degrees in the con 

 lions as well as in the essential form of bodies, which are 



by differences in specific weight. 



" It follou ore, that in proportion as condensation 



s, so does the hardness of bodies, and, mutatis 



urtlier consequence the sensitiveness of bodies 



aetioii diminishes with the progress of their COO- 



'ii. 



11 'I Hunt's it will be perceived coincide 



: those which guided us ('Spring i tome t\vr!\ | ago 



in maki :ohes on combinations of bodies under 



author then quotes from his paper, " Sur la 



t alii- pies sous I'aetion de la pression." 



made this quotation, it i> n.t to add 



:' our author, far 1 ss to lend them 



>upp<; .our part BO to do, 



the hi^h p" 'cupii'd by mr aut lior in tin- 



to show that II 

 ientitic cur: 



