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practiced at the perfect day, hit by the effect of calcination for sometimes in a slow red heat, This will derive glass, especially green glass, of its transparency, and vender the surface white to a certain depth, The comparison of the tube of glass seems to be [ ] a siliceous sand and an alkali [ ] with a small addiction of line and vegetable [ ]. It is hand, and will not receive seratiches, like the lead glasses, whence it is concluded that there is no lead in the composition, Its color seems also owning to the [ ] of the materials employed, like that common window and bottle glass. and it is probably caused by a minute portion of iron in the state of an oxygen confirmed with the sand and alkali. The ment [ ] covering the table, and the past in which these glasses were found, seem to have been con[ ] of similar materials, as they differ very little in colour, texture, or other external character. [ ] a very fusible brick clay, highly impregnated with oxide of iron and [ ] [ ] of green glass, are the principal ingredients of both. The eathen hot is, manifestly constructed of different materials from those employed for brown lottery at the present period. [ ] os a more imper[ ] material, and of a [ ] appearance. On Bis River, in the state of [ ] a similar [ ]