July, 1022
T H E JOCRSAL OF I N D USTRI.4 L A N D ENGINEERI.VG CHZMIISTRY
pliatc rock can lie smelted in tlic electric furnace for the pro-
duction of fertilizer material at a cost comparing very farorably with the present metiiodq. Fertilizer containing ammoni::, piiosplioric arid, and pot:ish, having five times tlic amount of plant food containcil in ordinary ctiinmercial fertilizers, liaar nctndl? been produced :it Sniiiston, and plans linvc been op lnrgcr wale opcr:itions. I iiis c o n c c i i t m t c i l fertilizer \rill liare the adwntage of ~b grmt recliirtinn iii ircigiits :id :I coiiscqncnt saving to the farmrr. I t roiwt lx: :iclniit,tid that, the f:trmcr .sill be i . 1 0 ~ to adapt D cmocntratoil fertilizer, 1,ut the rediiccd cost of
63 1
such material will greatly inflncnce him to utilize it. In fixing t,he ammonia from either by-product coke-oven gas, tlie Habcr, or other processes, pliospiinric acid may be snhstitnted for sulfuric and in t.his miinner girc two of tlie three essential elements of fertilizer. Innsmncli as the largest consimption of fert.ilizers is in the Sonth \There the nee ry raw niat,erials, pliwiiliate ro
