Fußbility. 59 Calx of Tron and I Magnesia. Heat. Of Binary Proportion. A A A A o magnelia ^ocalxof iron Socalxof iron 20 magnelia 7jcalxofiron 25 magnelia 66calxofi'on 3 < magnefia Iron fnlly calciued and Barytes. So barytes 20 calx of iron 1 75 barytes 2 5 calx of iron 66 barytes 3j calx of iron 75 calx of iron 25 barytes 66 calx of iron 33 barytes } hardened, but did not melt. melted, and paffed through the crucible. half melted. half melted. 1« ijc 150 156 1 S° "melted into a partly brownilli and partly reddilh fhining flagg. ’melted into a black bright fo- li'ted fubftance, refembling homeblende or an iron ore. ’ melted into a hard b'ack com- padt mafs, partly of a metallic andpat tlyofaglaflyappearance. "melted iuto a compadt metallic flagg. 'melted into a brownilli black flagg, rather compadt; mnch of the barytes icemed to have lubhmed, as the cover and upper part of the crucible rtceived a beautiful metallic white glaze Iron fuily cacined and Akcill. 80 argill "I to calx of iron J 160 7; argill \ 35 calx of iron j 160 66 argill 1 33 calx of iron J 166 50 argill 1 50 calx of iron J 160 f remainednpowder. Mr.Acliard 1 had the famc reiult. remainedapowder. Mr Achard found it lomewhat more in- clined to melt. a pale reddilh powder. Mr. Achard found it more inclined to melt. a yellowilh-red powder. Mr. Achard found it more inclined to melt, and greyilli black. 80 calx