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One part of platina and twenty of regulus of antimonybeing treated in the fame manner, the compound lookedbrighter, and of a leafy texture, little different from thatof the pure regulus.

The two metals were melted together in several of theintermediate proportions, but no other differences wereobserved than those abovementioned; the mixtures witha large proportion of platina being of a dull colour andclose texture, and those with a small one bright and leafy.All of them continue untarnished.

Though the platina and regulus seemed to unite verywell together, yet in flow cooling, part of the platina wasapt to subside. Six ounces of platina and twenty-four ofregulus of antimony having been melted together with aquick fire, and poured into a mould, the compound ap-peared uniform throughout. Being melted again, kept insteady fusion for five or six hours, and suffered to cool gra-dually in the furnace ; the upper part of the mass wasbright, and of a large leafy texture, much like the regulusat first; the bottom was much duller and of a closer tex-ture, and contained apparently a much larger proportionof the platira.

VIII. Platina 'with Silver.i. Twenty grains of platina, and the fame quantityof pure silver which I had revived from luna cornea, werecovered with borax, and urged with a vehement fire in ablast furnace. They melted difficultly together, and didnot prove fluid enough to run freely along the mould. Themetal weighed thirty-nine grains, and on the sides of the cru-cible were seen several small particles, amounting, as nearlyas could be judged, to about a grain more, so that thereappeared to be no loss of weight. The compound was hardto the file, and broke from a rude blow, though by gentle

strokes