Hand Book of Timber Preservation |
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absorbed absorption antiseptic applied boiler boiling point Burnett carbolic acid cells cent Chanute charge chemicals Chicago chloride of zinc chloride solution coal tar coil condensed condition cost creosote oil cubic feet cubic foot cylinder Dead Oil decay degree dissolved experience extract Fahr fiber filled fluid forced back gelatine give glue heat hydrometer impregnation injected introduced labor Las Vegas less matter means method Octave Chanute one-half operation Pacific penetration piles pine pipe plant pounds of oil practice pressure pure chloride quantity railroad Railway record removed retort Rowe Rueping seasoned solu solution tub specific gravity square inch steam strength surface condenser tank tannic acid tannin solution temperature Timber Preserving TIMBER TREATING tion Total track tram cars tree tub foot untreated vacuum pump valve vapor Vegas volume weight Wellhouse process wood zinc chloride zinc solution zinc-tannin process
Popular passages
Page 108 - All oil shall be the heavy or dead oil of coal tar, containing not more than ij4 per cent of water, and not more than 5 per cent of tar, and not more than 5 per cent of carbolic acid. It must not flash below 185° F. nor burn below 200° F. and it must be fluid at 118° F. It must begin to distill at 320° F. and must yield between that temperature and 410° F. of all substances, less than 20 per cent by volume. Between 410 and 470° F. the yield of naphthalene must be not less than 40 nor more than...
Page 105 - THE NORFOLK CREOSOTING COMPANY'S METHOD OF PRESERVING WOOD FROM MOLLUSKS AND THE ELEMENTS. The preservation of timber by the Dead Oil of Coal Tar process, as carried on by all well-equipped creosoting plants, consists of two distinct operations — the preparation of the wood, and its impregnation with the preservative. The preparation of the wood necessary for the proper reception of the preserving substances is the removal of all those portions of the tissue which are subject to fermentative action.
Page 105 - Upon the successful accomplishment of this entirely depends the value of artificially preserved wood for structural purposes. If this step of the operation is conducted at too low a temperature, or for too short a time, the sap or liquid part nearest the surface will only be extracted, the consequence of which will be an insufficient space for receiving the preservative. If, on the other hand, the operation is carried on at too high a temperature, or for too long a time, the resinous portion of the...
Page 202 - ... any charge of sleepers not giving the average impregnation of at least ;! galls, to be returned to the cylinder for further treatment. 10. The creosote to be a pure coal-tar distillate of the very best quality, free from water and all impurities, and on analysis to give the following results: To be entirely liquid at a temperature of 120 Fahr, and remain so on cooling to 93 degrees.
Page 108 - ... to a more or less perfect product. To the experienced operator these conditions indicate, in each case, the proper course to be pursued. Failure to observe and to take them into consideration is to invite indifferent, uncertain and in the end unsatisfactory results.
Page 98 - ... impregnation with creosote or corrosive sublimate, many of the railroads have adopted the chloride of zinc process." Steaming the wood under a pressure of sixty to seventy pounds per square inch, as done in Germany, preparatory to burnettizing, no doubt adds to its durability. Tredgold considers that steamed timber shrinks less and stands better than that which is naturally seasoned.
Page 98 - Navy, made known to the public his new process for treating wood. The invention consists of destroyng the tendencies of certain vegetable and animal substances to decay by submitting them to the action of chloride of zinc. The degree of dilution recommended by Mr. Burnett is one part volume by fifty parts of water. At first the method of impregnation was by immersion in open tanks.
Page 109 - ... maintained in the chamber, for a period of from five to eight hours, or until the discharge from the vacuum pump has no odor or taste, the temperature in the chamber being maintained at between 100 and 130° F. The chamber being again emptied of all sap and water the oil is to be admitted, the vacuum pump being worked at its full speed until the chamber is filled with oil. As soon thereafter as is practicable such a pressure shall be set up as shall cause the entire charge of timber to absorb...
Page 292 - ... contents of the wood. This can not be accomplished with the pure solution of chloride of zinc, and it may also be expected that such a mixture will enter with the protein substances of the wood into more insoluble, or either more...
Page 81 - ... on the principle that two bodies cannot occupy the same space at the same time. To be...