i 60 Ikon fully calclned and Argiil. Fufibiliiy. Heat Of Binary Proportions, ?o calx of iron ao argill calx of iron 2£ argill 66 calx of iron 33 arg' 11 Iron fully calcined and Silex. [ Jecalxofiron J A \ 7J f ex L zjcaixofiron . f 66 filex { 3 3 calx of iron A f so filex 1 50 calx of iron A J 8ocalxofiron " \ 20 lilex A J 7 5 calx of iron ia 5 lilex . f 66calxofiron 1 A \ 33 filex ] 160 melted into an opake porous black flagg. Mr. Achard alfo found a black porous mafs which pierccd through the .crucible. this experiment failed with me. •< Mr. Achard found a porous l. melted mafs. this alfo failed with me. Mr. Achard found a porous melted mafs; but the crucible was much corroded. feemingly melted, black and friable; yet I believe it was not melted, otherwife the next mixtures muft have been fo. not melted, black and friable, not melted, black and friable, fl agg. melted into a porous flagg that pierced the crucible. melted, and pierced through v the crucible. "melted, and pierced through the crucible. Hence we lee i that the compounds of Alex and calx of iron, in which tha (_iron exceeds, ad on argill. Ruft of Iron and Lime. 90 lime 10 ruft So lime 20 rult I2 5 “S 150 a broad hard mafs, began to. _ aft on the crucible. a hard brown mafs. liver-brown porcclain mafs. Ruft
