The Technical repository, by T. Gill, Հատոր 5Thomas Gill (patent-agent) 1824 |
From inside the book
Արդյունքներ 43–ի 1-ից 5-ը:
Էջ 22
... leaf , or are about half an inch out of the ground . Every vegetable , intended to be thinned or separated by the hoe , cannot have this process per- formed upon it too early ; since , from general observation , it is clearly ...
... leaf , or are about half an inch out of the ground . Every vegetable , intended to be thinned or separated by the hoe , cannot have this process per- formed upon it too early ; since , from general observation , it is clearly ...
Էջ 57
... leaves of various thicknesses , according to the manufactories . In order to make these leaves , the fused lead is poured upon a plate of cast - iron , with raised edges , placed above the pot ; and as soon as the surface of the metal ...
... leaves of various thicknesses , according to the manufactories . In order to make these leaves , the fused lead is poured upon a plate of cast - iron , with raised edges , placed above the pot ; and as soon as the surface of the metal ...
Էջ 58
... leaves , and sus- pend them over pieces of square wood , the width of the boxes in which they are to be placed : these leaves , thus suspended by the middle , resemble the leaves of a book ; and are placed , with the pieces of wood ...
... leaves , and sus- pend them over pieces of square wood , the width of the boxes in which they are to be placed : these leaves , thus suspended by the middle , resemble the leaves of a book ; and are placed , with the pieces of wood ...
Էջ 59
... leaves of lead in the boxes , they put in a mixture ; which is not , however , the same in all the various ... leaves of lead deposited in them , they place the boxes in a particu- lar kind of stove ; in which , by the means of heat ...
... leaves of lead in the boxes , they put in a mixture ; which is not , however , the same in all the various ... leaves of lead deposited in them , they place the boxes in a particu- lar kind of stove ; in which , by the means of heat ...
Էջ 60
... leaves . The mixture , which is put into the boxes to form the carbonate of lead , will only serve once : and when , as in many manufactories , potash enters into the mixture , the residuum is sold to the hatters . FOURTH OPERATION ...
... leaves . The mixture , which is put into the boxes to form the carbonate of lead , will only serve once : and when , as in many manufactories , potash enters into the mixture , the residuum is sold to the hatters . FOURTH OPERATION ...
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Common terms and phrases
acre alkali ammonia appear applied Arts barrels barytes Bas-Rhin beans boiling bottom Bouches-du-Rhône carbonate of lead carbonic acid carrots cast-iron Catgut catkins centimetres ceruse charcoal colour common contain copper crop cupel cured cylinder diameter dissolved Dutch employed equal experiments extract feet filtered four gold grass ground Hamburgh Haut-Rhin Haute-Saône heat hole improvements inches Indre-et-Loire iron John Heathcoat leaves litharge madder magnesia manner manufacture means Medal metal method mixed mixture mode mould nails narcotine Nièvre obtained operation opium ounces piece placed plants plate potash pots pounds precipitate prepared produce Prussian blue purpose quantity receive reverberatory furnace root salt screws seed sent shewn silver six months Society soil solution sown specimens steel stove straw sub-carbonate substances sufficient surface syrup taken thick tion tube vessel washed weight whole wood workmen zinc
Սիրված հատվածներ
Էջ 1 - Now know ye, that in compliance with the said proviso, I, the said Arthur Howe Holdsworth, do hereby declare that the nature of my said invention, and the manner in which the same is to be performed, are particularly tiescribed and ascertained in and by the following description thereof, reference being had to the drawing hereunto annexed, and to the figures and letters marked thereon...
Էջ 431 - Middlesex, mechanist, in consequence of a communication made to him by a certain foreigner residing abroad...
Էջ 144 - Manufacturer, in consequence of a Communication made to him by a certain Foreigner residing abroad, and discoveries by himself...
Էջ 255 - ... about three inches, when well immersed and stirred about therein. The feathers when thoroughly moistened will sink down, and should remain in the limewater three or four days ; after which the foul liquor should be separated from them by laying them in a sieve. The feathers should be afterwards well washed in clean water, and dried upon nets, the meshes of which may be about the fineness of cabbage-nets.
Էջ 92 - If this is rightly managed, the two liquids will not mix. Then place the tube in a horizontal position, and gently turn it round with the finger and thumb. The ether will very soon be impregnated with the platinum or gold, which may be known by its change of colour.
Էջ 399 - Ibs. of molasses, which has been previously made tolerably hot ; stir the composition well together, in the water-bath, over the fire, but without suffering it to boil. After being thus exposed to the heat for half an hour, and frequently well stirred, it should be withdrawn from over the fire, and allowed to cool for a short time, previous to pouring it into a cylindrical mould, made of tin, tinned sheet-iron, or copper, having a wooden cylinder previously supported in the centre, by means of its...
Էջ 102 - ... that surface uppermost which is to form the cast, and being banked up by sand in order that it may be perfectly supported. It is then, by means of a broad camelhair brush, to be covered over with a thin coating of wax and burgundy pitch, rendered fluid by heat.
Էջ 248 - Mr. Bevan observes, that the theoretical investigation, points out an equality of resistance to the entrance and extraction of a nail, supposing the thickness to be invariable ; but as the general shape of nails is tapering towards the points, the resistance of entrance necessarily becomes greater than that of extraction ; in some experiments he found the ratio to be about 6 to 5.
Էջ 92 - The process answers equally well for either gold or platina. Dissolve any quantity of gold or platina in nitro-muriatic acid, (aqua regia,) until no further effervescence is occasioned by the application of heat. Evaporate the solution of gold or platina, thus formed, to dryness, in a gentle heat, (it will then be freed from all excess of acid, which is essential,) and re-dissolve the dry mass in as little water as possible: next take an instrument which is used by chemists for dropping liquids,...
Էջ 4 - Saussure's process with supports of splinters of sapphire, which process, he observes, "has been scarcely at all employed; owing partly to the excessive difficulty, in general, of making the particles adhere, and in consequence of the almost unpossessed degree of patience required, and of the time consumed by nearly interminable failures.