SA. A SN. FOR Adv. of Science. 



1916. Pl. 4. 



Fig. S3. — Engines of several thousands of horse power using 

 blast-furnace gas. 



11 m m. g- 



Jmg. 34- — Two Gas-cngincs of r.ooo H.P. each, used for 

 town-lighting and Power. 



Prof. J Orr— Sources of Energy and Economy in Fuel. 



