344 
NOTES. 
Note A. — Nevertheless I read as follows in a journal devoted to 
chemistry : — 
“ It is pleasing to think that, perhaps, after all, the dream of the old 
alchemist was not so wild as it is thought to he ; and still more pleasing is 
it to think that some day it may possibly be realized” — C. T. Kingzett, in 
Chemical News, Sept. 20, 1872. 
Note B. — The formulae as assigned by Berzelius slightly modernized 
Compounds of Ethyl. 
C 4 H 5 , radical ethyl. 
C 4 H 6 C4, chloride of ethyl. 
C 4 H 5 0, oxide of ethyl (ether). 
0 4 H 5 0 -f H 0, hydrate of oxide of ethyl (alcohol). 
C 4 H 5 0 -f C 4 H 3 0 4 , acetate of oxide of ethyl (acetic ether). 
Compounds of Potassium. 
K, radical potassium. 
K Cl, chloride of potassium. 
KO, oxide of potassium. 
KO + HO, hydrate of oxide of potassium (caustic potash). 
KO C 4 H 3 0 3 , acetate of oxide of potassium. 
I do not stay to consider in what manner “ the theory of substitution * 
took possession of the radicals ,” how the theory of “ types” arose, nor how 
the new conception of 11 atomicity ” threw light on the constitution of things. 
The barriers which custom had raised up between mineral and organic 
chemistry have been overthrown ; and the discovery that the atoms of all 
elementary bodies have the same specific heat has led to a new system of 
atomic weights. 
* Wurtz, p. 114. 
