The Mechanic's Magazine, Museum, Register, Journal and Gazette, Band 30Robertson, 1839 |
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Seite 25
... portion of the bar was re- placed , and other fractures made , until the specimen had been used up . Fractures on bars , tried in this manner , are referred to in the tables as made at original sections . But as the slitting of bars in ...
... portion of the bar was re- placed , and other fractures made , until the specimen had been used up . Fractures on bars , tried in this manner , are referred to in the tables as made at original sections . But as the slitting of bars in ...
Seite 26
... portion of a bar prepared for gauging . C is a pair of proportional callipers of brass , pointed at a a with steel . S is a screw head projecting half an inch above the face of the instrument , and is one - third of an inch in diameter ...
... portion of a bar prepared for gauging . C is a pair of proportional callipers of brass , pointed at a a with steel . S is a screw head projecting half an inch above the face of the instrument , and is one - third of an inch in diameter ...
Seite 32
... portion of the Regent's - park , late the nursery of Mr. Jenkins , will shortly be laid out as botanical gardens , the Commis- sioners of Woods and Forests having granted a lease to a society newly formed , under the title of the Royal ...
... portion of the Regent's - park , late the nursery of Mr. Jenkins , will shortly be laid out as botanical gardens , the Commis- sioners of Woods and Forests having granted a lease to a society newly formed , under the title of the Royal ...
Seite 48
... portion of the adjacent country . It is an important point to observe , that every building , path , and lane , laid down in the ordnance survey , is contained in this map . To travellers by the train it will prove most useful , as ...
... portion of the adjacent country . It is an important point to observe , that every building , path , and lane , laid down in the ordnance survey , is contained in this map . To travellers by the train it will prove most useful , as ...
Seite 54
... portion being sustained without affecting the chains , I therefore multiply the entire weight by 2 , which amply ... portions of material . Bristol , Jan. 6 , 1838 . } - { 13 3rd Trial . " } cwt . { Mathematical Chain Model . Bore six ...
... portion being sustained without affecting the chains , I therefore multiply the entire weight by 2 , which amply ... portions of material . Bristol , Jan. 6 , 1838 . } - { 13 3rd Trial . " } cwt . { Mathematical Chain Model . Bore six ...
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acid apparatus appears applied atmosphere boat boiler camera obscura carbonic acid carriage cause centre charcoal coal colour common consequence construction copper crucible cylinder diameter effect employed engine equal experiments feet fire fixed fluid force friction fuel furnace Galignani greater hour improvements inches invention iron latent heat length lever light Liverpool London machine machinery Magazine manufacture matrass matter means Mechanics ment Messrs metal method Metropolitan Railway miles minute mode motion muriatic acid object observed obtained paddle-wheel paddles paper pass patent PHOTOGENIC DRAWING piece pipe plate portion pounds present pressure produced Prussian blue purpose quantity rails Railway ratus render resistance road screw side six months specific gravity specific heat steam steam-engine stove strength sufficient surface tained temperature tenacity thermometer tion trials tube vapour vessel W. A. Robertson weight wheel zinc
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Seite 415 - Archimedes; and he who perceived that the square of the hypotenuse of a right-angled triangle is equal to the sum of the squares of the other two sides, is not in consequence a Pythagorean.
Seite 284 - ... perfectly safe. But as it did not yet come up entirely to the inventor's expectations, he proceeded to contrive a third lamp, in which he proposed to surround the oil vessel with a number of capillary tubes. Then it struck him, that if he cut off the middle of the tubes, or made holes in metal plates, placed at a distance from each other, equal to the length of the tubes, the air would get in better, and the effect in preventing the communication of explosion would be the same.
Seite 244 - Nor when cold Winter keens the brightening flood, Would I weak-shivering linger on the brink.
Seite 346 - The images formed by means of a camera obscura have been found to be too faint to produce, in any moderate time, an effect upon the nitrate of silver.
Seite 348 - ... and may be fixed for ever in the position which it seemed only destined for a single instant to occupy.
Seite 7 - I will set before your eyes a type of a ' squirt' which hath been devised to cast much water upon a burning house, wishing a like squirt and plenty of water to be alwaies in a readinesse where fire may do harme ; for this kind of squirt may be made to holde an hoggeshed of water, or if you will, a greater quantity thereof, and may be so placed on his frame, that with ease and a smal strength, it sahl be mounted, imbased or turned to any one side, right against any fired marke, and made to squirt...
Seite 84 - As the three angles of a plane triangle are equal to two right angles, that is, to 180° (Euc, 32. 1.) the' sum of any two of them is the supplement of the other.
Seite 185 - Sir, — Permit me, through the medium of your Journal, to call the attention of engineers on railways to the very erroneous method many of them adopt in setting out the curves, which, if intended to be segments of circular arcs — ought certainly to be so. Of course it must be generally known, from the great radii of even the least of the curves on railways — it would be impracticable to strike them, as in the usual manner, from a fixed centre; but from the known relation between the sine and...
Seite 414 - But if it be again washed with a liberal quantity of the solution of silver, it becomes again sensible to light, and even more so than it was at first. In this way, by alternately washing the paper with salt and silver, and drying it between times, Mr.
Seite 346 - The copy of a painting or the profile, immediately after being taken, must be kept in an obscure place ; it may, indeed, be examined in the shade, but in this case the exposure should be only for a few minutes ; by the Light of candles or lamps, as commonly employed, it is not sensibly affected.