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The white is made of gypsum, mixed with albumen or honey; the yellows are ochre, or sulphuret of arsenic, the orpiment of our modern artists; the reds are ochre, cinnabar, or vermilion; the blues are pulverised lapis-lazuli, or silicate of copper. If the substance was rare or costly, a substitute drawn from the products of native industry was found.
This was furnished by the patent compound known as "Toxement," which is claimed by the inventor to be a resinate of calcium and silicate of alumina, which generates a resinate of lime and a silicate of alumina in crystalline form. It is further claimed that each of these materials is insoluble in sodium chloride and sodium sulphate, 3% solution.
I attribute my success in growing wheat to the use of silicate of soda, and yet, singularly enough, until now I have been unable to induce anyone else to try it. This season, however, several persons have applied to me to procure it for them. Among them is the talented editor of the "Liverpool Times," whose farm at Barton Moss shows what good management will accomplish on very unpromising soils.
Hillebrand in the admirable monograph on "The Analysis of Silicate and Carbonate Rocks," Bulletin No. 700 of the United States Geological Survey.
And yet I knew that this coast is visited for turquoises by Europeans; and that the gem has been, and still is, sold at Suez and Cairo. Mr. Clarke had many uncut specimens at Zagazig, embedded in a dark gangue, which he called "porphyry," as opposed to the limestone which bears the silicate of copper.
The other was composed of the same amount of the silicate with six drops of dilute phosphoric acid and six grains of ammonium phosphate. He filled sterilised tubes, sealed them hermetically, and heated them to 125 or 145 degrees, Centigrade, although 60 or 70 degrees would have killed any bacteria remaining in them. Next he exposed them to sunlight in a south window for from two to four months.
Almost in front of him, a few yards up the mountainside, he looked squarely at the mother of his float: a huge boulder of projecting silicate. It was there. During the following week he ascertained the dimensions of his vein of silver ore, and located two claims.
Basalt is an igneous rock composed largely of augite and felspar, which are silicate crystals of calcium, potassium, alumina, etc., of which the Moonstone is a variety. The connecting link is that clairvoyance is found to be unusually active during and by means of moonlight.
I doubt the possibility of making silicate of soda by merely mixing lime, sand, and salt together, as my chemical friends tell me this cannot be accomplished unless the silex and the alkali are fused together. If a soluble silicate of soda can be made in the way you mention, it will be a great saving of expense. Has it been tried? Playfair. This is very desirable, but as Dr.
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