On basic iron our furnnco A produced in 1913. about 16 per cent,. morc iron with 12 pcr cent. lcss coke thnn it did in 1907. which was tho best year under nnturnl blnst, and our furnncc H, making foundry iron, prduccd 22.3 por ccnt. moro iron in 1913 with 2.7 per cent,. lcsa coka than in 1908 which wns tho beat ycnr under nnturnl blnst. Onc pculinr fnctor in tlic dry blnst plnnt is thnt occasionnlly in wintor, whcn tho tcmpcrnturo fnlls to say 10" or 16' below zcro, tho nioisturo in tho outsido nir is lower thnn wo rcquirc, nnd thorcforc, as wo prefcr to have n constnnt rnthcr thnn nn cxtrcmcly low inoisturo content, wo sornctinics run tho dry blnst plnnt bnckwnrds, nnd odd to tho originnl prccntngo of moisture. Ordinnrily wo kecp tho moisturo contcnt in tho dricd air uniformly between 0.80 nnd 0.90 grain pcr ob. ft. For instnncc. on Fobrunr 12, 1914. the tcmpcrnturc of tho outsido nir wns 5' ' F. berow zero nnil tho nioisturo contcnt wna 0.2 grnin p r cb. ft. This nir was delivered to tho furnnco n t n tcmpcrnturo nt 11.2' F. with nioieturo nt 0.76 gmin. To do this it nna ncccssnry to n$d to tho blast 6557 lb. of inoisturo in thc 21 hours. rhis was nccomplbhed by pnssing 10 x)r ccnt. of tho firnt stage brino circulntion throu *h n c l o d coil stcnni hcnter and keoping the first stagoirinc at a tcnipcraturo of 200 F. cold dry nir from tho outsiclo was wnrnicd in panring tho first stago coils nnd rapidly nbsorhed moisturo bv subliinntion of tlic snow on tho second ntngo coils. Rcgu~ntion of tho nioisturo can bc cffccterl in this mnnner as long na any snow remnin. on tho accond stngo coils. Thus, ns tho records show, tlicro has b w n n goncrnl improvement in nmount of product, nlso from cast to cast tho chcmical com osition of tho nictnl produced is inor0 uniform, and Iantfr this has been ncconiphhed with less fuel per ton of Iirduct under tho conditions-of dry Mast M compared with thnt of nnturnl nir. I n concluding, I wish to cxprwa my thnnks to Ilr. Jns. Campbell. Chief Ehginccr of tho dry bllcst, to Ilr. John Scott, our Consulting Enginccr. nnd t o Ilr. Corbett ii'hitton, all of whom kindly gar0 mo crery facility to . obtnin any datn rcquird.