β Scribed by R.L. Brown; R.B. Cooper
No coin nor oath required. For personal study only.
Nov., I926.] U.S. BUREAU OF MINES NOTES. 669 methods. Besides the circular saw, a modified type of gang saw has been developed, and is in successful use in several slate mills. Other labor-saving devices include an air-driven slate splitter, power-driven punching machines, and trimming machines for heavy slates. Various new uses are being developed. A new slate product, struco, consists of slabs lacquered in various colors, which overcomes the objection of sombre color, where natural slate color is not suitable to the architectural pattern. Natural variegated slates of irregular shapes produce attractive rustic effects and are coming into insistent demand. Irregular fragments usually discarded are now finding pleasing application in walks, floors, and pavements. Floor tile and sawn shingles are being manufactured, and slate veneered shingles with a composition backing are being tested. Further details are given in Serial 2766 of the Bureau of Mines, recently published. COMPOSITION OF THE LIGHT OILS FROM LOW-TEMPERATURE CARBONIZATION OF UTAH COALS.
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Commercial gasification processes are usually operated at high pressure for economic considerations. However, there is very little information available on the influence of pressure on the carbonization of coal under conditions relevant to high pressure fixed bed gasifiers. This investigation involv
The compositions of the volatile products from Gray-King low-temperature carbonization assays of five coals are considered, with reference to our previous work showing the relations of the hydrocarbons and the oxygen-containing structures in coal to those in such products.
## Interfacial tension and density measurement of the system corn germ oil -carbon dioxide at low temperatures In this article, the physical properties of corn germ oil at high pressures of up to 30 MPa and at low temperatures from 210 7C to 22 7C are presented. We measured the interfacial tension