ADVERTISEMENTS. 



xi 



Telegrams : 

 "Theodosius." 



Telephone : 

 Avenue 4372. 



GAS ENGINEERS 



RECORD your 

 CALORIFIC VALUE. 



"SARCO" Specialities 



INCLUDE 



Automatic CO 2 

 Recorders. 



Draft and Pressure 

 Recorders. 



Pyrometers. 

 Thermometers. 



Continuous 

 Sulphur Testers, 



&c. 



"SARCO" RECORDING 

 GAS CALORIMETER. 



FOR PARTICULARS, APPLY TO 



SANDERS, RENDERS & CO., Ltd 



108, Fenchurch St., London, E.G. 



