Van Nostrand's Eclectic Engineering Magazine, Volum 4D. Van Nostrand, 1871 |
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amount arch axle blast boiler bridge caisson canal carried cast iron cause cent centre charge chlorine civil engineering coal compression considerable construction cost course curve cylinder depth diameter direction distance effect employed engine equal experiments fact flange force friction furnace gauge girder inch increase iodine length less load locomotive manufacture material matter means mechanical ment metal miles motion obtained ordinary pass phosphorus pier pig iron piles pipe plate portion practical present pressure principle produced proportion proved puddling furnace pyrometer quantity quartz radiant heat radiator railroad rails railway resistance river road Russia sand screw ships side square steam steel stone strain strength surface temperature tical timber tion tons torpedo traction engine tube ture tyres valve velocity vertical vessel vis viva weight wheels wrought iron
Passatges populars
Pàgina 332 - Inst. CE, and M. Inst. ME Third Edition, Revised and much improved, with 115 Double Plates (20 of which now first appear in this edition), and numerous Additions to the Text. In Two Vols., Imp.
Pàgina 71 - After entering the air-lock, as the pressure increases, the first sensation experienced is one of great heat. As the pressure is still further increased a pain is felt in the ear, arising from the abnormal pressure upon the ear-drum. The tubes extending from the back of the mouth to the bony cavities over which this membrane is stretched, are so very minute that...
Pàgina 446 - BLOXAM, Professor of Chemistry in King's College, London ; Professor of Chemistry in the Department of Artillery Studies, and in the Royal Military Academy, Woolwich.
Pàgina 612 - The cannel coals have usually a more distinctly stratified structure, are more compact and homogenous in texture, and contain a larger percentage of volatile matter than the others ; also the gas they furnish has higher illuminating power. Hence they would be used, to the exclusion of all others, for the manufacture of gas, only that the coke which they furnish is of inferior quality. They are therefore, for the most part, employed as household fuels— for which they are specially adapted — and,...
Pàgina 265 - In eight years, between 185664, the charges on goods have been lowered, on an average, by 28 per cent; the public have sent 2,706,000 tons more goods, while they have actually saved more than $4,000,000 on the cost of carriage, and the public treasury has earned an increased net profit of $1,150,000." A further reduction, made subsequently to this statement, in 1864, exceeded even these results, and under it the tonnage rose from 4,479,000 tons in 1863, to 6,533,000 in 1864. In 1865, the government,...
Pàgina 338 - ... according to well-known mechanical principles, =0; for these currents counteract each other, and therefore cannot exert the least influence on the axial rotation of the earth. This important conclusion was proved by Laplace. The same law holds good for every imaginable action which is caused either by the radiant heat of the sun, or by the heat which reaches the surface from the earth's interior, whether the action be in the air, in the water, or on the land. The effect of every single motion...
Pàgina 612 - I have enumerated, are doubtless due, principally, to the circumstances of their formation. The furnace coals have generally a distinctly laminated structure, and are composed of bituminous layers separated by thin partitions of a material allied to cannel, which does not coke. Hence the bitumen in them is held in cells, and cannot flow together and give the mass a pasty, coherent character. The cementing coals have few such partitions, but show, upon fracture, broad, brilliant surfaces of pitch-like...
Pàgina 599 - In the author's report on the state of the bridge, he noticed what he deemed defects in the construction of the roadway, but as there was no positive symptom of failure, it was allowed to remain. He conceived, that in the anxiety to obtain a light roadway, mathematicians and even practical engineers, had overlooked the fact, that when lightness induced flexibility, and consequently motion, the force of momentum was brought into action, and its amount defied calculation. On the llth of October, 1838,...
Pàgina 488 - The general conclusion is this— Frost does not make either iron (cast or wrought) or steel brittle, and that accidents arise from the neglect of the companies to submit wheels, axles, and all other parts of their rolling stock to a practical and sufficient test before using them.
Pàgina 103 - Take oil of turpentine, add to it, drop by drop, and while stirring, strong sulphuric acid, until a, syrupy precipitate is quite formed, and no more of it is produced on further addition of a drop of acid. The liquid is now repeatedly washed with water, every time...