358 



On the Transferring of Liquids. 



motor; and all those corresponding with C to another rod proceeding 

 from the other pole. In case the calorimotor cannot be placed at a 

 sufficient distance to secure it from injury, it may be shielded by a 

 strong cover. Under this, the operator might be protected ; but if it 

 be not convenient to have the shield large enough for his protection, 

 a cord may be resorted to, which being attached to the lever of the 

 machine, and made to pass through one pulley or more, will enable 

 him to cause the acid to act upon the plates, at any distance which 

 may be desired. 



It can scarcely be necessary to point out that the method of com- 

 municating ignition described here for the purpose of rock blasting, 

 may be applied as the means of exploding a mine. As, for instance, 

 the mines associated with the fortifications erecting near Newport, 

 as a part of the means of annoyance, might have a communication 

 through copper wires with a galvanic apparatus in those situations to 

 which the besieged might be expected to retire, putting it thus com- 

 pletely in the power of the commanding officer, to select that time for 

 the explosion when its effects would be most serviceable. 



2. Apparatus for transferring a liquid from a carboy, or cask, to bot- 

 tles; especially useful in the case of sulphuric acid, the decanting of 

 which is always more or less dangerous to the manipulator, espe- 

 cially as detached globules may reach the eyes. 



