Cyclopædia of useful arts & manufactures, ed. by C. Tomlinson. 9 divs, Volume 81852 |
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Page 691
... supply of heat is necessary to effect this , but when all is over we have no more apparent heat , nothing hotter , only a vessel of water at 32 ° instead of ice at 32 ° . Dr. Black showed , and it is perfectly established and ...
... supply of heat is necessary to effect this , but when all is over we have no more apparent heat , nothing hotter , only a vessel of water at 32 ° instead of ice at 32 ° . Dr. Black showed , and it is perfectly established and ...
Page 693
... supply continue uniform , because the area of the second vessel is larger than that of the first . This represents the thermometer indicating the addition of heat to ice till it arrives at 32 ° , then remaining stationary till all is ...
... supply continue uniform , because the area of the second vessel is larger than that of the first . This represents the thermometer indicating the addition of heat to ice till it arrives at 32 ° , then remaining stationary till all is ...
Page 696
... supply rivers with sufficient by no common phenomenon , we have no means of to maintain and make them portable from town to guessing how great a quantity must be moved , and town , and for the bettering of lands all the way it how far ...
... supply rivers with sufficient by no common phenomenon , we have no means of to maintain and make them portable from town to guessing how great a quantity must be moved , and town , and for the bettering of lands all the way it how far ...
Page 697
... supply the steam , the pressure of which drove it up to D ; and when B was emptied , the cock F was shut , and the steam generated in another vessel c , to raise its contents , while B was being refilled . Worcester speaks of so making ...
... supply the steam , the pressure of which drove it up to D ; and when B was emptied , the cock F was shut , and the steam generated in another vessel c , to raise its contents , while B was being refilled . Worcester speaks of so making ...
Page 698
... supply of steam at s , and what was thus enclosed in c being rapidly condensed into water , an almost entire vacuum would be left between P and s , so that the atmospheric pressure on the supply tank would drive water through the valve ...
... supply of steam at s , and what was thus enclosed in c being rapidly condensed into water , an almost entire vacuum would be left between P and s , so that the atmospheric pressure on the supply tank would drive water through the valve ...
Expressions et termes fréquents
acid action acts admitted allowed applied arrangement atmosphere becomes bodies boiler boiling bottom called cane carried centre close cold colour common consists contains copper course crystals cylinder diameter direction distance edge effect employed engine equal feet fire fixed force fuel give given glass green half heat inches increase iron juice kind lead leaves length less liquid lower manufacture material matter means measure mercury metal minute motion moved nearly obtained pass piece pipe piston placed plate portion position pressed pressure prevent produced proportion quantity raised removed round screw separate side solid solution space steam stone substance sugar sulphuric acid supply surface temperature thick tion tube tunnel turned usually valve varnish vertical vessel warm weight whole wood
Fréquemment cités
Page 910 - ... graceful architectural mouldings ; sometimes surmounted with classic figures of great beauty, and opening with brass doors kept as bright as if they were of gold. In houses of less display, these stoves are merely a projection in the wall, coloured and corniced in the same style as the apartment. In adjoining rooms they are generally placed back to back, so that the same fire suffices for both. These are heated but once in the twenty-four hours, by an old Caliban, whose business during the winter...
Page 748 - Daniell, who has stated to us that from the results of experiments, he is of opinion ' the nearer the magnesian limestones approach to equivalent proportions of carbonate of lime and carbonate of magnesia, the more crystalline and better they are in every respect.* 1 657.
Page 742 - ... instead of employing given weights adapted to the lines of least resistance. The line of least resistance is that line by which the explosion of the powder will find the least opposition to its vent in the air. This need not necessarily be the shortest line to the surface; as, for instance, a long line in earth may, from the same charge, afford less resistance than a shorter line in rock. Supposing the matter in which the explosion is to take place to be of uniform consistence in every direction,...
Page 926 - ETC. 179 in evidence given before the Health of Towns Commission, and in other published documents, both an extraordinary reduction of the number of sick applying for relief, and of the severity of diseases occurring.* Wide experience elsewhere has since obtained similar results. Most of the hospitals and poor-houses in the kingdom now have these chimney-valves ; and most of the medical men and others who have published of late on sanitary matters, have strongly commended them.
Page 695 - An engine so contrived, that working the primum mobile forward or backward, upward or downward, circularly or cornerwise, to and fro, straight, upright, or downright, yet the pretended operation continueth, and advanceth, none of the motions above-mentioned hindering, much less stopping the other; bnt unanimously, and with harmony agreeing, they all augment and contribute strength unto the intended work and operation. And therefore I call this...
Page 910 - Within these great houses, not a breath of cold is experienced. The rooms are heated by stoves, frequently ornamental rather than otherwise ; being built in tower-like shapes, story over story, of pure white porcelain, in various graceful architectural mouldings; sometimes surmounted with classic figures of great beauty, and opening with brass doors, kept as bright as if they were of gold. In houses of less display, these stoves are merely a projection in the wall, coloured and corniced in the same...
Page 791 - Ireland from the establishment of the manufacture of sugar from the beet-root ; and, it appears to me as eminently calculated to be of service, not only as creating a new and extensive source of manufacturing employment, but, also, that, as the material used can only be profitably obtained by means of improved agriculture, and that an important element in the profits of the manufacture would be the careful economy of the scums and pulp...
Page 696 - ... to keep them sweet, running through several streets, and so performing the work of scavengers, as well as furnishing the inhabitants with sufficient water for their private occasions ; but likewise supplying...
Page 820 - To see how the action of caffeine, asparagine, theobromine, &c. may be explained, we must call to mind that the chief constituent of the bile contains only 3'8 per cent, of nitrogen, of which only the half, or 1-9 per cent., belongs to the taurine. Bile contains in its natural state water and solid matter, in the proportion of 90 parts by weight of the former to 10 of the latter. If we suppose these 10 parts by weight of solid matter to be choleic acid, with 3-87 per cent, of nitrogen, then 100 parts...
Page 885 - ... a stack of the same conical shape, are let into this cavity. The whole is then covered with turf, to prevent the volatile parts from being dissipated, which, by means of a heavy wooden mallet, and a wooden stamper worked separately by two men, is beaten...