Bi gM aes : eis Oy es OS Eh ee 
308 Friedel and Crafts on the combinations of 
ing bodies, whose existence and mode of formation it is impos- 
sible to account for by any other theory. Such are the chlor- 
hydrids and acetins derived from ssoranen 4 silicic ether, Si(C,H,0), 
and at first we only studied the compounds which belong to the 
same type as the normal silicic ether, but the research led us 
further than we anticipated, and resulted in the discovery of . 
alcoholic radicals, ethyl, C,H,, and methyl, CH,, are combined 
directly with the silicon, and not, as in the ethers, through the 
medium of oxygen. The present paper is devoted to the de- 
— of these latter bodies. i 
he study of the compounds of silicon with alcoholic se 
rine and bromine for hydrogen, and of acting as radicals in aleo- 
hols and ethers ; consequently silicon may take the place of car 
n in a hydrocarbon, and in the series of bodies which can be 
derived from a hydrocarbon, without modifying essentially its 
properties. 
to build up groups of atoms, which have been compared to 
