The Mechanics' Magazine, Museum, Register, Journal, and Gazette, Volumen34M. Salmon, 1841 |
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Términos y frases comunes
action angle apparatus applied Archimedes attached axis boiler bottom carriage cast iron cause centre cistern claim communication condenser connected connecting rod consists construction copper Cornish engines crank crank pin cutter cylinder DAVY LAMP described diameter Dublin effect engine Enrolment Office equal feet fire fixed flame fluid force frame furnace Galignani gine heat improvements inches invention iron J. C. Robertson lever lifting engines locomotive machine machinery manufacture means Mechanics ment Messrs metal mode motion obtained paddle paddle-wheel passing pipe piston placed plate present pressure produced propelling Published by J. C. pumps purpose quantity rail railway reciprocating engine revolving rollers Rolls Chapel ropes rotary rotary engine rotatory screw shaft side six months slide speed steam steam-engine stroke substances surface tical tion tube turn upper valve VELOCIPEDES velocity vessel weight wheel wire wire gauze wood zinc
Pasajes populares
Página 89 - ... the angle of reflection is always equal to the angle of incidence, the image for any point can be seen only in the reflected ray prolonged.
Página 129 - Davy was once shown a dexterously manipulated experiment, he said — " I thank God I was not made a dexterous manipulator, for the most important of my discoveries have been suggested to me by failures.
Página 395 - Mr. Cooke is entitled to stand alone, as the gentleman to whom this country is indebted for having practically introduced and carried out the Electric Telegraph as a useful undertaking...
Página 58 - ... he has been useless for several years. I could not but observe with a great deal of pleasure the joy that appeared in the countenances of these ancient domestics upon my friend's arrival at his country-seat.
Página 130 - ... a substitute by the circumstance of a patent having been previously obtained for the crank in its simple form ; and that he abandoned...
Página 153 - That they have not failed from déficiences in the workmanship and practical details, is rendered still more probable by the circumstance of finding among the names of inventors, those of the most eminent practical engineers. We have next shown that in theory, the crank of the steam-engine in common use, cannot, as has been supposed, be attended with a loss of power, as such loss would oppose the established doctrines...
Página 200 - ... action of vegetable matter upon the sulphates, and the immense quantities of vegetable matter which must be brought by the rivers within the influence of the saline matter of the sea, renders, on the contrary, the second origin extremely probable. Decaying vegetable matter abstracts the oxygen from sulphate of soda, and a sulphuret of sodium is formed. This again acting upon water decomposes it, and sulphuretted hydrogen is one of the products of the decomposition.
Página 333 - The only advantageous way in which great power could be applied, would be by contriving to prevent the increase in the weight of the machinery and fuel, and those engineers would be most successful who could so apply the materials of construction, as to ensure strength without the usual corresponding increase of weight. Mr. George Mills, from his experience as a ship-builder, at Glasgow, was enabled to confirm all that Mr. Seaward had advanced. On the Clyde, the employment of an excess of power in...
Página 58 - Nothing is so glorious in the eyes of mankind, and ornamental to human nature, setting aside the infinite advantages which arise from it, as a strong steady masculine piety ; but enthusiasm and superstition are the weaknesses of human reason, that expose us to the scorn and derision of infidels, and sink us even below the beasts that perish.
Página 195 - ... of water. For, if there were no hole in the trunk, the pressure of the water would be equal against all parts of its sides within. But when the water has free egress through the holes, its pressure there is entirely removed : and the pressure against the parts of the sides which are opposite to the holes turns the machine.