Cane Mills; and Megass as Fuel. 57 
the combustion of megass under boilers, with a view of 
doing away with the — to him — unsightly copper walls 
he sketched an oven in front of a tubular boiler, almost, 
exa6tly the same as the chamber in front of the first 
taiche of a copper wall, or what is known as a Jamaica 
train. Mr. TAIT, in 1866, furnished a boiler for Leonora, 
which was set according to directions, 25 feet grate sur- 
face, and the result from both megass and coals 
exceeded my most sanguine expectations. The original 
boiler was only taken out the other day, and has been 
replaced with the present one on the same lines ; and 
with a view of trying conclusions between green and 
logie-dried megass fed in the furnace of this boiler, I 
had an almost exact duplicate boiler hung alongside 
of the other, on Coster's principle, for megass from the 
mill. 
No. 1. — Coster's principle 42a' fire grate to a boiler 10' x 7' with 
104 4" tubes=i042 H.S. 
No. 2. — Tait's principle 25 D'fire grate to a boiler 12' x 7' with 
96 4" tubes=iiS2 HS, 
Being No. I, — 25 H Surface to 1 fire grate. 
No. 2,-46 „ „ „ „ 
The trial lasted over 3 hours and was carefully 
watched by Mr. HERIOT, the estate's engineer, and by 
Mr. ALEXANDER, the analytical chemist from Tuschen. 
To both of these gentlemen I am deeply indebted for the 
interest taken and assistance given, in an attempt to 
solve the important problems now under consideration. 
I call it an attempt ; because I am well aware that to 
arrive at correctness further experiments are called for, 
and I trust that, having set the ball rolling, others will 
join in. I also take this opportunity of thanking the 
gentlemen connected with the various estates for the 
H 
