The Mechanic and Chemist: A Magazine of the Arts and Sciences, Volumen41839 |
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Página 13
... Practical Science about a week since, I saw among the multiplicity of things there exhibited, a capital substitute for a Leyden jar, and I have sent you a cheap substitute for the same, B n, is a piece of stiff card-board, supported by ...
... Practical Science about a week since, I saw among the multiplicity of things there exhibited, a capital substitute for a Leyden jar, and I have sent you a cheap substitute for the same, B n, is a piece of stiff card-board, supported by ...
Página 28
... practical application. The following is the opinion and recommendation which we published in "the Mechanic" No. 37, July 27 : — " A railway curve of half a mile radius, is bad and dangerous. Curve lines should never be laid on a plane ...
... practical application. The following is the opinion and recommendation which we published in "the Mechanic" No. 37, July 27 : — " A railway curve of half a mile radius, is bad and dangerous. Curve lines should never be laid on a plane ...
Página 32
... practical manner something which I had heard theoretically advanced many times before : that knowledge is power, either for good or for evil, and is only conducive to happiness when enlisted on the side of virtue. In the early part of ...
... practical manner something which I had heard theoretically advanced many times before : that knowledge is power, either for good or for evil, and is only conducive to happiness when enlisted on the side of virtue. In the early part of ...
Página 33
... practical joking experienced such a timely and salutary check. From what I have been told, the giant really looked as large outside the caravan as he did inside it, and he did not require the aid of stilts to increase his height. As to ...
... practical joking experienced such a timely and salutary check. From what I have been told, the giant really looked as large outside the caravan as he did inside it, and he did not require the aid of stilts to increase his height. As to ...
Página 38
... practical men. Important to Miner*. — Professor Graham, at the meeting of the British Association, made an important practical suggestion, which may bo the means of saving many uses. m observed that the after damp, or carbonic acid ...
... practical men. Important to Miner*. — Professor Graham, at the meeting of the British Association, made an important practical suggestion, which may bo the means of saving many uses. m observed that the after damp, or carbonic acid ...
Términos y frases comunes
acid action answer appear applied atmosphere become body brass called carbonic cause centre coins colour combination common considerable construction contains continued copper correspondents direction draw Editor effect electricity engine equal experiments feet fire fluid force four give given glass gold half hand heat inches increase Institution iron kind known length less letter light lime London machine manner means Mechanic metal method miles mixed motion nature necessary object observed obtained operation oxygen pass Penny person piece plate portion pounds practical present Press produced proportion quantity received remain render round screw side silver Society solution steam steel Street substance sufficient sulphuric supposed surface taken tion tool tube turn vessel weight wheel whole
Pasajes populares
Página 174 - And how well doth it execute its office! An anatomist, who understood the structure of the heart, might say beforehand that it would play; but he would expect, I think, from the complexity of its mechanism, and the delicacy of many of its parts, that it should always be liable to derangement, or that it would soon work itself out. Yet shall this wonderful machine go, night and day, for eighty years together, at the rate of a hundred thousand strokes every twenty-four hours, having, at every stroke,...
Página 251 - ... small globules having a high metallic lustre, and being precisely similar in visible characters to quicksilver, appeared, some of which burnt with explosion and bright flame, as soon as they were formed, and others remained, and were merely tarnished, and finally covered by a white film which formed on their surfaces.
Página 125 - Pampas ? or in what more powerful creature can we find the cause that has effected the extirpation of his race? His entire frame was an apparatus of colossal mechanism, adapted exactly to the work it had to do; strong and ponderous, in proportion as this work was heavy, and calculated to be the vehicle of life and enjoyment to a gigantic race of quadrupeds, which, though they have ceased to be counted among the living inhabitants of our planet, have, in their fossil bones, left behind them imperishable...
Página 66 - It is on the rivers, and the boatman may repose on his oars ; it is on highways, and begins to exert itself along the courses of land conveyance ; it is at the bottom of mines, a thousand feet below the earth's surface ; it is in the mill, and in the workshops of the trades. It rows, it pumps, it excavates, it carries, it draws, it lifts, it hammers, it spins, it weaves, it prints.
Página 251 - ... in a state of intense activity ; and a platina wire, communicating with the positive side, was brought in contact with the upper surface of the alkali. The whole apparatus was in the open atmosphere.
Página 252 - ... depth of three or four inches of water at the bottom, and a small ladder reaching to the top of the jar. On the approach of dry weather the frogs mount the ladder, but when wet weather is expected, they descend into the water.
Página 56 - The height of the mercury in the tube above the surface of the mercury in the basin...
Página 49 - ... whom we have employed, (and in saying this I express the experience of every manufacturer on the continent to whom I have spoken, and especially of the English manufacturers, who make the loudest complaints.) These characteristics of depravity do not apply to the English workmen who have received an education, but attach to the others in the degree in which they are in want of it.
Página 265 - The worst of all positions is that in which we look downward vertically. 4. If we stand straight up and look horizontally, parallel markings or lines will be seen most perfectly when their direction is vertical; viz. the direction in which the lubricating fluid descends over the cornea. 5. Every part of the object should be excluded except that which is under immediate observation. 6. The light which illuminates the object, should have a very small diameter. In the daytime it should be a single hole...
Página 160 - Would he were fatter! but I fear him not: Yet if my name were liable to fear, I do not know the man I should avoid So soon as that spare Cassius. He reads much; He is a great observer, and he looks Quite through the deeds of men; he loves no plays, As thou dost, Antony; he hears no music...