GASEOUS COMBUSTION AT HIGH PRESSURES. 



279 



lever about 12 inches long, is 0'5 inch in diameter with a stroke of 1'5 inches, and it 

 is easily capahle of giving a pressure of 100 atmospheres, if required. 



The function of the pump is to raise the mixture of glycerine; and water from the 

 reservoir below the table (into which the liquid is discharged by gravity flow during 

 the admission of the gas into the compression cylinder) and to force it into the 

 compression cylinder, whereby the gas is compressed and also transferred under 

 pressure into its proper storage cylinder. The mixture of glycerine and water is thus 

 kept in constant movement during the cycle of operations involved in the compression 

 of the gas, being alternately run out from the bottom of the compression cylinder as 



/7 



Fig. 2. 



Fig. 3. 



each successive charge of gas is being drawn into the system from the large storage 

 holder, and afterwards pumped back into the compression cylinder during the 

 compression of each charge and its transference under pressure to its small storage 

 cylinder. This cycle of operations is controlled by the two valves of the compression 

 cylinder and the entrance valve to the storage cylinder. 



(C). The Storage Cylinders. 



The storage cylinders, of which there are four in the installation, have each a 

 capacity of about 500 c.c. ; the body of each cylinder (fig. 3) is constructed out of a 

 mild steel forging, and is fitted with a bronze-coned valve, A, provided with a union 



