[5i3 J

2. One part of platina and two of lead, covered withblack flux and borax, and exposed to a gradual fire in awind-surnace, did not come into due fusion till the fire hadbeen raised to a strong white heat. From the long con-tinuance of the fire in this experiment, the loss was great,amounting to nearly one twenty-fourth part of the mix-ture. The ingot proved hard and brittle like the pre-ceding, but the texture striated, and the striae disposedtransversely.

3. One ounce of platina and three of lead, treated in thesame manner, required still a very strong fire for their per-fect fusion, and lost about one twenty-sixth. The metalbroke less easily than either of the preceding, and in somemeasure stretched under the hammer. Its colour wassomewhat darker, and inclined more to purplish.

4. One part of platina and four of lead being coveredwith black flux and common salt, and committed to awind furnace, the platina still did not appear perfectly,taken up till the fire had been raised to a considerablystrong white heat: the loss was about one fortieth. Thesame proportions of the two metals, dropt into a fluid mix-ture of the flux and salt previously brought to the abovedegree of heat, quickly melted, and lost only one part in ahundred and sixty. The ingot was much tougher thanthe preceding, filed well, and cut tolerably smooth with aknife. On breaking, the upper part appeared composedof bright plates ; the lower, of dark purplish grains.

5. One part of platina and eight of lead united easily ina quick fire, and lost little or nothing. The metal work-ed, and looked, like very bad lead. On breaking it, thetexture appeared partly composed of transverse fibres, andpartly of grains; its colour was dull and purplish.

6. One part of platina and twelve of lead united with--out loss into a compound very little different from the

preceding..