A Dictionary of Arts, Manufactures, and Mines: Containing a Clear Exposition of Their Principles and Practice, Τόμος 1D. Appleton & Company, 1870 |
Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
acetate acetic acid alcohol alkali alloy alum alumina ammonia antimony apparatus bath beer blue bobbin boiler boiling bottom calcined caoutchouc carbonic acid cent charcoal chlorine clay cloth coal color consists contains copper cotton crystals cupel cylinder diameter dissolved distilled ditto drawing rollers dried employed evaporation feet fermentation flour frame furnace gallons gluten grain measures grains ground heat hydrogen inches iron lime liquid liquor machine malt manganese manufacture matter melted metal mixed mixture mordant mould muriate muriatic acid nitric nitric acid obtained operation ounces oxide oxyde oxygen passed pieces pipe placed plates portion potash pounds precipitate produced proportion pulley quantity rollers salt screw shaft shank silk silver soda soluble solution specific gravity spindles starch steam substance sugar sulphate sulphuric acid surface tartaric acid temperature tube vessel vinegar washed weight wheel wort
Δημοφιλή αποσπάσματα
Σελίδα 551 - Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is (d).
Σελίδα 219 - It consists of the cylindrical form, varying from five to seven feet in diameter, with two flues, which extend the whole length of the boiler; they are perfectly cylindrical, and of sufficient magnitude to admit a furnace in each. This boiler is the simplest and probably the most effective that has yet been constructed. It presents a large flue surface as the recipient of heat, and the double flues when riveted to the flat ends add greatly to the security and strength of those parts. It moreover...
Σελίδα 22 - Sykes's hydrometer, possesses in many respects decided advantages over those formerly in use. The committee of the Royal Society state that a definite mixture of alcohol and water is as invariable in its value as absolute alcohol can be, and can be more, readily and with equal accuracy identified by that only quality or condition to which recourse can be had in practice, namely, specific gravity.
Σελίδα 279 - An ordeal stronger still was then resorted to ^ a train of 200 tons of coals was allowed to rest with all its weight for two hours in the centre of the...
Σελίδα 88 - If the ground is tolerably soft, the weight of the two workmen bearing, upon the cross-bar and occasionally forcing it round, will soon cause the chisel to penetrate ; but if the ground is hard or strong, the workmen strike the chisel down with repeated blows, so as to peck their way, often changing their situation by walking round, which breaks the stones, or other hard substances, that may happen to obstruct its progress. The...
Σελίδα 310 - The face of the block is either carved in relief into the desired design, like an ordinary woodcut, or the figure is formed by the insertion edgewise into the wood of narrow slips of flattened copper wire.
Σελίδα 9 - Fir does not answer. The heat is kept up during the day-time, and the furnace is allowed to cool during the night. Next morning the door is opened, the charcoal removed, and a new charge of wood is introduced. The average product of crude vinegar called pyrolignous acid is 35 gallons. It is much contaminated with tar; is of a deep brown colour; and has a sp.
Σελίδα 408 - ... of water. These shelves are piled one over another in the chamber, to the height of five or six feet, cross-bars below each keeping them about an inch asunder, that the gas may have free room to circulate over the surface of the calcareous hydrate. The alembics for generating the chlorine, which are usually nearly spherical, are in some cases made entirely of lead, in others, of two hemispheres joined together in the middle, the upper hemisphere being lead, the under one cast-iron. The first...
Σελίδα 89 - This fork is to be brought down under the shoulder, near the top of each rod, and made fast to it by passing a pin through two little holes in the claws. The rods are thus drawn up, about seven feet at a time, which is the usual distance between each joint; and at every haul a fork...