roLI.ECTlONS IN KCONOMIC (JKOLOCJY AND M KTA I.I.I K(;V 1 II 



iU'sidi'S this. ;il»(»iil ,'.,(l(MI tons nl' sim'hihI (|il;»llt\ ttic Wfic iiiiiit'd. 

 Tliis s('('oii<l-(|u;iIity ore is roastt'd in r»'{'taii;^Milar Uiliis, in cliaij^r.s of 

 HH) tons, for wliicli 3.1 eonls of wood ar<' n'<|niiT(l. Tlic coinph'tc roast- 

 in^' nM|niies .1 days, hut as soon as tin- front of tlm cliar;,'*'! is roastrd 

 it is reinovfd, and sncrrssivo portions ai«.i taken out from tiiiic to time 

 nntil the cliarj;!' is compU'tcd, Tliis roastin,i^ is maiidy for tlic pnrposc 

 of disintegi'atin,u' tin* ore previous to stamping". Tin', roasted <»r(' is 

 sul>j('(;to(l to coarsen crnsliin;;, <lry, to ])ass tlirou^li screens \vitii Ijoles 

 tliree-ei^litlis of an ineli in dianu'ter. TUe e.rnslied material is e(>u(;eii- 

 trate«l cm a Coukliuj? jij;. Two tons of this concentrating ore will fur- 

 nish about 1 ton of concentrates contaiiiiufj (j<> to (»."> per cent, of iron. 



The furnace ore is shipped away for smelting ami the concentrates 

 -are treated in the ndmont for<:e by the Catalan i)rocess. The collec- 

 tion taken by ]Mr. J. 1>. ^lackintosh, E. M., August, 18S4, shows: 



On. 



(1) I'liruiiot'. Magiietitf, ;^r;imilar, ill tliiii l;iyir.<. (r>rjii'J. ) 



C-i) Coiuentratiiig. Magnetite, li'Itl8|tar, lionibleude, iiiiil quart/.. (ril'J(H. ) 



(.:{) Roasted. (.^4yiO.) 



(4) Coucentrates. (.">4211.) 



TaiJiiiijH. 



(1) Coiitaiiiiiij;tlic <niartz, CeldHpar, li()riil)leii(lc, willi a lit tin iiiaL^iietite, of the oro. 

 Fioiu the ooucuiitiatiii;!; operation. (r)4l.'l2. ) 



iiia.MONi roKiiK. 



This forge is situated at tiic nortiiern end of Chateangay Lake, 

 Franklin County, New York, and the power for running it is furnished 

 by the Chateaugay Kiver. The ore used is the separated ore fiom the 

 liogerstield mine, which still contains sutlieient of the original i^angue 

 material to form all the slag re(piired, so that no liux is used. The fuel 

 IS char(;oal. The variety of wood used for this juirpose includes birch, 

 maple, tamarack, cherry, elm, beech, hemhxdc. pine, i)oplar, spruce, 

 balsam, ash, and basswood, the harder wood producing the best char- 

 coal. The woo<l yields from IL' to 45 bushels of charcoal per cord. The 

 forge ccuitains sixteen tires, cousisting of a fireplace surmounted by a 

 rectangular chimney l.\ by 4.] feet. Tlie lireplace is ,'{ feet (i inclu's wide 

 and ."5 feet deep, with a working plate projecting L' teet (» incin-s in fr<Mit. 

 -Ml the work is carried on Ihrongli one opening .'? feet <» inches by 2 

 feet. The lower lirst foot of the front is clo.sed by the cinder plate, 

 throngii wiiich the cinder is tajiped from several holes. Pipes for 

 lieating the blast pirvioiis t(» its us«' ate arraiiLied in the ni»pcr part 

 of the chimney. 



This lirejtlace is lirst (•liar;;ed witii sullirinit ili;irc(-;il to brin;: it to 

 a jirojirr ti'inprratinc, and I'lnuges of oie and cliaifo;!! .m' then .nldrd 

 sncct'ssi\ cly. .\ portion ol' the iron is rednceil to tlie metallie state, 

 and these particles gather together until a snital)h' lumpealled " loupe" 



