TRANS. NZ. INSTITUTE, VOL VT. PL. V. 7 
ban wae $ 
BOILER FRONT ° 
BOILER FELTING 
TO PREVENT BURNINC AND RADIATION OF HEAT. 
Illustr ustrating Paper by JC Firth 
On: x) 
„ео, 
SMOKELESS FURNACE. 
Illustrating Paper by H. Shey. 
