Cfiap. i.] Engine. 389 



horizontally by the handle h, and opens or fruits the 

 communication at the lower end of the pipe E within 

 the receiver. It is reprcfented in the plate by a circu- 

 lar dotted line. 



i i y the fpanner, which is a long rod or plate of iron 

 for communicating motion to the handle of the regula- 

 tor, to \vhich it is fixed by means of a flit in the 

 latter, and fome pins put through to fallen ir. 



k /, the vibrating lever, called the Y, having the 

 weight k at one end and two legs at the other end. It 

 is fixed to an horizontal axis, moveable about its center- 

 pins or pivots mn, by means of the two (hanks op 

 fixed to the fame axis, which are alternately thrown 

 backwards and forwards by means of two pins in the 

 working plug j one pin on the outfide cfrpreffing the 

 fhank 0; throws .the loaded end k of the Y from the 

 cylinder into the pofition reprefentcd in the plate, and 

 caufes the leg / to ft like againft the end of the fpanner, 

 which, forcing back the handle of the regulator or 

 fleam-cock, opens the communication, and permits 

 the fleam to fly into the cylinder. The pifton imme- 

 diately riling by the admiffion of the fleam, the work- 

 ing beam I I rifesj which alfo raifes the working- 

 plug, and another pin which goes through the flit 

 raifes the fhank p, which throws the end k of the Y 

 towards the cylinder, and, ftriking the end of the fpan- 

 ner, forces it forward, and (huts the regulator ileam- 

 cock. 



qr y the lever for opening and (hutting the injection 

 cock, called the F. It has two toes for its center, 

 which take between them the key of the injec~lion- 

 cock. When the working-plug has afcended nearly 

 to its greateft height, and Ihut the regulator, a pin 

 catches the end q of the F and raifes it up, which 

 opens the injection-cock, admits a jet of cold water to 

 Cc 3 fly 



