260 T. S. Hunt on the Theory of Types in Chemistry, 
not possess a saline character are derivatives of acids which are 
acids are derived from it by a substitution of Cl and NO, 
or H, are necessarily monobasic, and I then pointed out the 
the discovery of the very anhydrids whose formation I h 
foreseen.* 
I also showed that hydrogen is to be looked upon as the fan- 
I farther pointed out that sulphur in its ordinary state was . 
be regarded as a triple molecule, S, (or S,=4 volumes), a0 
referred sulphurous acid, SO, (S,0,), to this type to which 
. : A i ested that 
orant Jorm of oxygen, ozone micht be O.. urtz has sin 
adopted sulphur vapor at 400° ©. = S, as the type of the triple 
* The anhydrids of the monobasic acids c ; equivalents of the 
acid minus one pat of water, regen Sogo et hile those of the 
ibasic acids are formed from one equival ; imilar eli 
of an equivalent of water, thus COs} Mes 7a renee both classes ¥ 
anbydrids are to be referred to the type of one molecule of water, H202 : 
b 
