Fujibility, . SS t T A B L E S Of the Fufibility of the Simple Earths mixed in various Proportions, in Heats not exceeding i66° of Wedgevuood. Calx and Magnesia. Heat. i 0 . Of Binary Proportions. 50 parts calx "I 50 magnefia J 80 calx 1 20 magnefia 75 calx T 25 magnefia 60 calx 33 magnefia 80 magnefia 1 20 calx J 66 magnefia 1 33 calx J 30 calx 1 10 magnefia J 150° 150 1C0 165 138 156 ’melted, only where in contaft with the crucible, into a grey, partly vitrified and partly porce- lain mafs. Per Lavoifier alfo they melt in no proportion; and alfo Bergm. 372' vent through the crucible. went througli the crucible. went through the crucible. 'did not melt but where in con- ta£l with the crucible, which it flightly corroded and black- ened. ‘did not melt but where it touched the crucible. melted into a fine greenifli yel low glafs, but the crucible was corroded throughout. Calx and Baryte j infufible in all proportions per | Lavoifier. Calx and Argill 88 calx ] 12 argill J [ infufible even by the heat of \ pure air. Ehrm. § 20S. E 4 Calx