MR. J. NASMYTH ON WAR ROCKETS. 



209 



rocket, permits the guide-tube and socket to revolve on 

 its axis with all due facility. 



The requisite amount of axial rotation is conveyed to the 

 guide-tube and thence to the rocket resting within it, by 

 means of a powerful clock-spring S, transmitting its rota- 

 tion to the rocket through the train of wheels C, C", C". 



Previously to firing the rocket the wheel C" is locked by 

 the catch or trigger D ; the spring S is then wound up and 

 the aim and elevation of the rocket adjusted. The match 

 of the rocket is then lighted ; and in order to secure ener- 

 getic combustion of the rocket ere it is allowed to rush 

 forth on its course, the rocket is held in check by three 

 slight springs within the guide- tube at the rear of tlie 

 rocket, by means of which it is not permitted to rush 



SER. III. VOL. IV. p 



