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nir through the room nnd loivcrs the r n t c of combustion. Tho author also draws attention to the radicnl importance of n grnte being ns littlo recessed as possible, so tlint no obstnclo should screen off the rndintion.
I n conclusion, Dr. Fishenden refers to tho rclntivo cost of coal, gns, nnd electricity. Taking tho heating cfficioncy of coal (including heating of nir, wa!ls, and brickwork) ns a t lcnst 30 por cent. the modern gas fire nt 00 per cent. nnd tho electric Iicntcr a t 100 por cent., nnd assuming conl to cost 45s. per ton, as 4s. 6d. per lo00 cb. ft., nnd electric power nt 12 per unit, the cost of s con1 firo for continuous henting is only nbout one-third tlint of n good gas fire, and onefifth thnt of nn electric firo of cqiinl henting capacity.
๐ SIMILAR VOLUMES
put of nir-dried pent per worker per clnywns 15 tons, whercns nn Irish hnnd-cutter, cntclicr nnd ahcclcr spread about 11 tons of rnn mnterini per anp, or o m ton pcr ninn pcr dny of air-dried pent. Bttompts hnve hecn made from tinio to timo to ninkc paper, building mntcrinl, alcohol, petrol, nnd cl