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 be ; and still more pleasing is 

 it to think that some day it may possibly he reali%ed" — 0. T. Kingzett, in 

 Chemical Neus, Sept. 20, 1872. 



Note B. — The formulae as assigned by Berzelius slightly modernized : — 



Compounds of Ethyl. 

 C4 H5, radical ethyl. 

 C4 H5 C4, chloride of ethyl. 

 C4 H5 0, oxide of ethyl (ether). 

 C4 H5 0 + HO, hydrate of oxide of ethyl (alcohol). 

 C4 H5 0 + C4 Hg O4, acetate of oxide of ethyl (acetic ether). 



Compounds of Potassium. 



K, radical potassium. 



K CI, chloride of potassium. 



KO, oxide of potassium. 



KO + HO, hydrate of oxide of potassium (caustic potash). 

 KO + C4 Ho O3, 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 '•' 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. 



