Transactions of the Society Instituted at London for the Encouragement of Arts, Manufactures, and Commerce, Volúmenes 43-44 |
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Página xv
... effect of the smoke , would be inaccessible , in order to extinguish the flames or to rescue valuable property ; and ... effects by availing himself of the solvent power which pure dis- tilled or rain - water exercises on this substance ...
... effect of the smoke , would be inaccessible , in order to extinguish the flames or to rescue valuable property ; and ... effects by availing himself of the solvent power which pure dis- tilled or rain - water exercises on this substance ...
Página xvi
... effects by greatly diminishing the size of his galvanic battery , ( a part of the apparatus which is usually the most ex- pensive and troublesome to manage ) , by his simple and ingenious mode of keeping it always when wanted at a ...
... effects by greatly diminishing the size of his galvanic battery , ( a part of the apparatus which is usually the most ex- pensive and troublesome to manage ) , by his simple and ingenious mode of keeping it always when wanted at a ...
Página xvii
... effects of the two upon the human body . # In the class of Mechanics the sum of ten guineas has been given to Mr. Friend for his secret lock ; it is on the general principle of the letter locks , but by means of a moveable scutcheon it ...
... effects of the two upon the human body . # In the class of Mechanics the sum of ten guineas has been given to Mr. Friend for his secret lock ; it is on the general principle of the letter locks , but by means of a moveable scutcheon it ...
Página xxii
... effect- ing this is to place the anchor in the boat's stern , and to coil the cable on the gunwale ; but this lumbers up the boat , overloads it , and exposes it to the im- minent hazard of being swamped in a high sea . Το obviate this ...
... effect- ing this is to place the anchor in the boat's stern , and to coil the cable on the gunwale ; but this lumbers up the boat , overloads it , and exposes it to the im- minent hazard of being swamped in a high sea . Το obviate this ...
Página xiii
... effect on the crop - the Gold Medal . Conditions the same as for the preceed- ing premium . Preventing the blight on Fruit Trees and Culinary Plants . 41. To the person who shall discover to the Society the most effectual method of ...
... effect on the crop - the Gold Medal . Conditions the same as for the preceed- ing premium . Preventing the blight on Fruit Trees and Culinary Plants . 41. To the person who shall discover to the Society the most effectual method of ...
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315 | |
21 | |
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acres Aikin anchor apparatus basket bason best copy best drawing best original paint boat bridge brush-wood catch 22 chalk cloves cocoons colony colour cultivation Ditto effectual eggs employed engraving equal experiments feet Fifty Guineas fixed full account George Gold Ceres Medal Gold Isis Medal Gold Medal Gold Vulcan Medal grass greatest quan greatest quantity ground hemp Henry improved inches Indian ink invent and discover iron James John landscape large Silver Medal last Tuesday leaves less manufactured merit mode mulberry tree person plantations plants portrait pounds pounds weight premium prevent rack raised rope screw Secretary seed side silk silk-worms Silver Ceres Medal Silver Isis Medal Silver Palette Sneaton Society a method Society the best Society's soil specimens spring Strand stud superior Thirty Guineas Thomas timber Tuesday in February Tuesday in March upper weight wheel white mulberry William wood worms Zealand flax
Pasajes populares
Página 160 - The above figure is a representation of the engine; A is the pipe by which the supply of water is brought from a head, 170 feet above the engine ; B is a vessel containing air, the continual elastic pressure of which prevents the blow that would otherwise be occasioned by the descent of the water; c is a throttle valve...
Página 42 - In some instances it is well to run small wood pegs through the portions of glue, so as to keep them exactly in their proper positions. If the mould be of considerable size, it is better to let it be bound with moderate tightness upon a board to prevent it bending whilst in use ; having done as above described, the plaster of Paris, as in common casting, is to be poured into the mould and left to set. In many instances wax may...
Página 42 - The description thus given is with reference lo moulding those bodies which cannot be so done by any other than an elastic mould ; but glue moulds will be found greatly to facilitate casting in many departments, as a mould may be frequently taken by this method in two or three pieces, which would on any other principle require many.
Página xxxvi - To the person who shall invent and produce to the Society a method, superior to any hitherto known or in use...
Página 302 - An Appeal to the British Nation, on the Humanity and Policy of forming a National Institution for the Preservation of Lives and Property from Shipwreck.
Página 34 - The pot is then turned and fixed in a proper position in the furnace, without being allowed to cool, and is then charged with cold iron, so that the metal, when melted, shall have its surface a little below the mouth of the pot. The iron is melted in about an hour and a half, and no flux or addition of any kind is made use of. A pot will last for fourteen or even eighteen successive meltings, provided it is not allowed to cool in the intervals ; but if it cools, it probably cracks.
Página 113 - II.) where bb is the copper dish, surrounded by a ring of the same, by which the plate is firmly screwed down upon the rim of the main hole. In the middle of...
Página 161 - The rod of the piston w is attached at its top to one end of the beam ; at the other end of the beam is a rod, terminating below in the crank m: the oscillating motion of this crank is transferred, by means of the connecting bar /, to the axis k, on which is placed the curved tooth or cam n...
Página 107 - In making the sword-blades there are several methods used ; some make a pile of alternate layers of soft and hardened steel, with powdered cast-iron, mixed with borax, sprinkled between each layer. These are drawn out to one-third more than the length of the intended blade, doubled up, heated, twisted, and reforged several times ; the twist is brought up in the same way as that in the gunbarrels.
Página xiv - To the person who shall discover to the Society the cheapest and most effectual method of raising water in quantities sufficient to be beneficially employed for the purpose of irrigating land, superior to and cheaper than any other method now in use ; — the Gold Medal, or Fifty Guineas. A model, on a scale of one inch to a foot, with...