| F On the Electric Telegraph of Prof. Morse. 61 
other words, the wire at the point of insulation is imbedded in a 
i | glass parallelopiped. The glass in its turn is protected and sur- 
La rounded by wood, and the Fig. 4. 
if wire slides through the glass 
E _ ably in a cast iron cap, the 
glass tube (3). The caps, 
of whatever form, are either 
upon cross-bars or supported 
by iron staples driven into the 
4 
-keepers, 
operators, copyists, book-keepers, battery rs 
and inspectors or repairers. Messages to be transmit- 
messages vary in value from 10 cents to $100. Messages thus 
received are filed according to destination, and sent in order of re- 
As a general 
ion, commencing with the 
