Bulletin, Ausgabe 7

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Seite 24 - ... 5. Excess of silica. A large excess of silica indicates a sandy clay. If present in the analysis of a fire clay it indicates low refractoriness. ''6. The quantity of organic matter. If this is determined separately, and it is present to the extent of several per cent, it would require slow burning if the clay was dense. "7. The presence of several per cent of both lime (CaO) and carbon dioxide (CO,) in the clay indicates that it is quite calcareous.
Seite 91 - Food adulterant; paint fillers; paper filling; electric insulators; pumps; fulling cloth; scouring soap; packing for horses' feet; chemical apparatus; condensing worms; ink bottles : ultramarine manufacture ; emery wheels ; playing marbles ; battery cups; pins, stilts and spurs for potters' use; shuttle eyes and thread guides; smoking pipes; umbrella stands; pedestals; filter tubes ; caster wheels ; pump wheels ; electrical porcelain ; foot rules; plaster; alum.
Seite 91 - Domestic. Porcelain, white earthenware, stoneware, yellow ware and Rockingham ware for table service and for cooking, majolica stoves: polishing brick, bath brick, fire kindlers. "Structural. Brick: common, front, pressed, ornamental, hollow, glazed, adobe; terra cotta; roofing tile- ; glazed and encaustic tile; drain tile; paving brick; chimney flues; chimney pots; doorknobs; fireproofing; terra-cotta lumber; copings; fence posts.
Seite 9 - II. Transported by A. Gravity assisted by water. Deposits near the heads and along the slopes of ravines. B. Ice. Deposits resulting mainly from the melting of the ice of the Glacial epoch. C. Water. 1. Marine, 2. Lacustrine, 3. Stream. D. Wind. Loess. Orion V- classification. (Major divisions on basis of origin, some of the minor divisions on basis of uses and properties.) CLAYS Clays are rocks in which the mineral "Kaolinite...
Seite 250 - Taff°> describes it as follows: "This shale, 250 feet in thickness, rests upon the Wewoka formation and its crop in this quadrangle is limited to a small triangular area in the northwestern corner. The surface of the formation becomes broader northward in the more level country about Holdenville, 3 miles north of the border of the quadrangle. "The formation is composed of friable, blue clay shale with local thin beds of shelly limestone and shaly calcareous sandstone in the upper part. The sandstone...
Seite 24 - ... 3. The color to which the clay burns. This may be judged approximately, for clays with several per cent or more of ferric oxide will burn red, provided the iron is evenly and finely distributed in the clay, and there is no excess of lime. The above conditions will be affected by a reducing atmosphere in burning, or the presence of sulphur in the fire gases. 4. The quantity of water. Clays with a large amount of chemically combined water sometimes exhibit a tendency to crack in burning, and may...
Seite 79 - ... machines. The plunger machines have already been noticed in connection with the soft mud process. They were formerly used very largely for all the stiff mud products, but are almost altogether replaced by the auger machines except for the manufacture of sewer pipe. The sewer-pipe press (pl. 3) consists cf two vertical cylinders. A rod connects two pistons, one in each cylinder. The upper cylinder is the steam cylinder and the lower the clay cylinder. When the piston is withdrawn from the clay...
Seite 98 - The pavement may be opened to traffic as soon as the brick are laid. (3) The pavement may be taken up easily and without breaking of the brick. (4) It is practically watertight, particularly after being in service a short time. The disadvantages of a sand filler are: (1) It does not protect the edges from chipping. (2) It may be washed out on steep slopes. (3) It is removed from the tops of the joints by street sweepers.
Seite 24 - This may also be judged approximately, for the greater the amount of iron present the deeper red will the clay burn, provided the iron is evenly and finely distributed and an excess of lime is not contained in the clay. If the proportion of iron to lime is as 1 to 3, then...
Seite 217 - The Bandera shale varies in thickness from nothing at Oolagah to 100 feet at the Kansas line. The exposures are all at some distance from any railroad and there has been no development of this shale in Oklahoma. The Nowata shales form a very important horizon for the development of the clay industries of the State and deserve detailed description. For this purpose the portion of Ohern's paper dealing with them is given in full. "Lying above the Oolagah formation and constituting the highest beds...

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