438 NOTICES OF THE MEETINGS [May 5, 
Mineral burthen. 
Limestone Liewt eee Qe = 3°60 
Welsh Mine 10 cwt.. . . 326... O = 36:02 
Red ore Lab pats ie ia SR Ds ees 60 
Cinder Ate. re ere M3EOks 18 alee 
15 ewt. 489... 0 54:02 = 
= Consumption of Iron minerals per ton of Iron made. 
No. 2. Furnace at Cwm Celyn ;—one week's work, ending 
7th April, 1854; working well. 
Charges driven, 652 ; Tron made, 236 tons 16 ewt. 
Cwt. Tons Cwt. Cwt. 
Coal burthen 10 380 Charges = 190.. 0 = 16:08 
Coke... 61 272 ,; =i) (Ol hz0l 20 abee 
652 22°91 = 
= Consumption of fuel per ton of Iron made. 
Mineral burthen. 
Tons Cwt. Cwt. 
Limestone & : cwt. ; ete HAG ae 3°89 
Welsh mine wldiscwt p28 OO ake. == Ob 
Red ore real Asap rts 63°... 4 0 = 5°50 
Cinders Gers: ree Sooo se) ao 
19 cwt. G19. 48 52°26 
= Consumption of minerals per ton of Iron made. 
From this statement it appears that with the same number of 
charges, No. 2 made during the week 55 tons 7 cwt. more iron than 
No. 1; that while No. 1 took nearly 31 cwt. of fuel to make a ton 
of iron, No. 2 took only 23cwt.; that No. 1 carried a “ burthen” 
of 15 cwt. of iron minerals on each charge of fuel, and No, 2, 
19 cwt.; and that while No. 1 required 54 cwt. of iron minerals to 
make one ton of iron, No. 2 required 52 cwt. 26 lbs. only. 
The colour, consistence, and general appearance of the scorie, 
cinders, or slag, are to the furnace manager good general indications 
of the manner in which his furnace is working. When white iron is 
being made, a good cinder will have a clear olive green colour, and 
will flow regularly and smoothly from the tap-hole; a ‘* scouring” 
