Page's Engineering Weekly, Том 6Page Publishing Syndicate, Limited., 1905 |
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Сторінка 1191 - Society representing the American Society of Civil Engineers, the American Society of Mechanical Engineers, the American Institute of Electrical Engineers, and the American Institute of Mining...
Сторінка 1026 - The investigations of the committee warrant them in putting forward the following practical suggestions : 1. Two main lightning rods, one on each side, should be provided, extending from the top of each tower, spire, or high chimney stack by the most direct course to earth. 2. Horizontal conductors should connect all the vertical rods (a) along the ridge, or any other suitable position on the roof; (b) at or near the ground.
Сторінка 1047 - ... per cent. Thus the absence or presence of carbon in ordinary carbon steel in which other special elements are not present seems to have but little influence. That there is no error in this statement is proved, independently of the tensile tests, by the fact that several bars of the - SCI- and mild steel specimens were submitted to the low temperature test, and tested by hand hammer immediately after immersion.
Сторінка 1220 - The Engineer. In Medium 8vo. Pp. i-xv + 248, fully Illustrated. Price 10:. 6d. net. CONSTRUCTIONAL STEELWORK : Being: Notes on the Practical Aspect and the Principles of Design, together with an Account of the Present Methods and Tools of Manufacture. BY AW FARNSWORTH, Associate Member of the Institute of Mechanical Engineers. "A worthy volume, which will be found of much assistance. ... A book of particular value."— Practical Engineer.
Сторінка 1047 - SCI, (containing 99-82 per cent, iron), becomes brittle to an extraordinary degree under the influence of low temperatures, whereas nickel itself, tested under the same conditions, has improved rather than deteriorated, not only in tenacity, which iron also does, but in ductility , in which latter quality iron entirely breaks down. If nickel, therefore, is present in an iron alloy containing but little carbon, or comparatively low in that element, it acts as a preventive of brittleness, or is a very...
Сторінка 824 - Specially arranged for the use of Engineers qualifying for the Institution of Civil Engineers, the Diplomas and Degrees of Technical Colleges and Universities, Advanced Science Certificates of British and Colonial Boards of Education, and Honors Certificates of the City and Guilds of London Institute, in Mechanical Engineering, and Engineers generally.
Сторінка 1240 - Numerous experiments were carried out, but the results varied too much amongst themselves to allow any conclusions to be drawn as to the manner in which the specific heat may vary with pressure or temperature, except that any such variation must be small, and by no means of the order indicated by the results of the throttling experiments based on Regnault's tables. The mean of all the results gave...
Сторінка 1047 - USA, read a paper on this subject, of which the following is an abstract : — " Cast iron — the raw material from which the malleable metal is made — may be formulated approximately as follows : — Silicon (Si), 5 to 3 per cent. Phosphorus (P), 05 to 2 per cent. Manganese (Mn) , 0 to 20 per cent. Sulphur (S), 25 to 2 per cent. Carbon (C), 2 to 5 per cent. Iron (Fe...
Сторінка 1099 - For plates specially intended for cold flanging and marked for identification, the tensile strength is to be between the limits of 26 and 30 tons per square inch. In the case of material for purposes in which tensile strength is not important, the tensile test may be...
Сторінка 1026 - ... modification of the existing practice of erecting single lightning rods, especially in the case of extensive and lofty buildings that project well above surrounding structures, or that stand isolated in the open country. " It is obvious that the extent to which the building should be protected, and the expense to be incurred in this protection, must bear some definite relation to the importance or cost of the building itself. In cases where protection is considered desirable, but heavy expense...