Annual Report, Band 15Capital Publishing Company, state printer, 1924 |
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Absorption Alum Bluff formation Apalachicola River Arca average Brick Company brick plant Brick red Buff burned products Cent Chattahoochee China Clay Chione cancellata Citronelle clay deposits Clay Lab Color common brick Conrad Cream DeLeon Springs Dexland Escambia County exposed Fire tests Florida China Clay Florida clays following physical properties fuller's earth Gadsden County Geologic horizon Gray hard at cone Johns River judged by feel kaolinite kiln Lake County lime limestone limonite Linear air shrinkage Linear Shr marl mineral Miocene Modulus of rupture Nashua marl Ocala Ocklocknee Okahumpka overburden Overfires at cone Pensacola Phacoides phosphate Pleistocene Pliocene Pore water Shrinkage Porosity pottery pounds per square residual clays sample sandy clay sedimentary kaolin Shrinkage water Linear silicates SiO2 Slaking test Steel square inch structural materials surface Tampa Temperature test Steel hard underlain vitrified Volume air shrinkage ware water Linear air Water of plasticity water Shrinkage water White
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Seite 106 - Urinals, closet bowls, sinks, washtubs, bathtubs, pitchers, sewer pipe, ventilating flues, foundation blocks, vitrified bricks. Decorative. — Ornamental pottery, terra cotta, majolica, garden furniture, tombstones. Minor uses. — 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...
Seite 97 - To measure the temperature of a furnace or kiln the tube containing the wires is placed in it either before starting the fire, or else during the burning. If the latter method is adopted, the tube must be introduced very slowly to prevent its being cracked by sudden heating. The degrees of temperature are measured by the amount of deflection of the needle of the galvanometer. Thermoelectric pyrometers are useful for measuring the rate at which the temperature of a kiln is rising, or for detecting...
Seite 97 - This consists of two wires, one of platinum and the other of an alloy of 90 per cent platinum and 10 per cent rhodium. These two are fastened together at one end, while the two free ends are carried to a galvanometer which measures the intensity of the current. That portion of the wires which is inserted into the furnace or...
Seite 78 - ... and lime (CaO), with the percentage of each given separately. The sum of these two percentages would, however, be equal to the amount of lime carbonate present. While the ultimate analysis, therefore, fails to indicate definitely what compounds are present in the clay, still there are many facts to be gained from it. The ultimate analysis of a clay might be expressed as follows : Silica...
Seite 70 - Non-calcareous. (b) Lacustrine clays. (Deposited in lakes or swamps.) Fire-clays or shales. Impure clays or shales, red-burning. Calcareous clays, usually of surface character. (c) Flood-plain clays. Usually impure and sandy.
Seite 29 - ... fossils were collected which indicate that Pliocene marls are extensively developed along the valley of St. Johns River. These beds possess certain faunal elements which distinguish them from the other Pliocene beds of Florida and are given a distinct name — the Nashua marl — from a locality on St. Johns River where they are best exposed. Further study may result in uniting all of the marine Pliocene of Florida under a single name; but for the present it appears desirable to avoid hasty correlation...
Seite 70 - Lacustrine clays. (Deposited in lakes or swamps.) Fire-clays or shales. Impure clays or shales, red-burning. Calcareous clays, usually of surface character. (c) Flood-plain clays. Usually impure and sandy. (d) Estuarine clays. (Deposited in estuaries.) Mostly impure and finely laminated. II. Glacial clays, found in the drift, and often stony. May be either red- or cream-burning. III. Wind-formed deposits (some loess). IV. Chemical deposits. (Some flint-clays.) SECONDARY CHANGES IN CLAY DEPOSITS Changes...
Seite 79 - ... (1) The purity of the clay, showing the proportions of silica, alumina, combined water, and fluxing impurities present. High grade clays often show a percentage of silica, alumina, and chemically combined water, approaching quite closely to kaolinite. "(2) The approximate refractoriness of a clay; for other things being equal, a clay with high total fluxes is commonly less refractory than one with low total riuxes.
Seite 82 - If, however, the temperature is raised higher than is required simply to drive off the carbon dioxide, and if some of the mineral particles soften, a chemical reaction begins between the lime, iron, and some of the silica and alumina of the clay, the result being the formation within the clay of a new silicate compound of very complex composition. The effects of this combination are several. In the first place, the lime tends to destroy the red coloring of the iron and impart instead a buff color...
Seite 89 - Plasticity may be defined as the property which many clays possess of changing form under pressure, without rupturing, which form they retain when the pressure ceases, it being understood that the amount of pressure required, and the degree of deformation possible, will vary with the material.