Philosophical MagazineTaylor & Francis, 1869 |
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Page 26
... heating is to be sought neither in terrestrial magnetism , nor in conduction , nor radiation of heat , nor in the surrounding air . I think , as I have already said , that the cause lies in the agitations caused by the wheelwork . I ...
... heating is to be sought neither in terrestrial magnetism , nor in conduction , nor radiation of heat , nor in the surrounding air . I think , as I have already said , that the cause lies in the agitations caused by the wheelwork . I ...
Page 28
... heat is . MR22 sin2 . This loss of vis viva and gain in heat occurs twice during each 2 rotation - in the unit of time if T denotes the time of one ro- tation of the disk . T ' The heat produced , therefore , in the unit of time is ...
... heat is . MR22 sin2 . This loss of vis viva and gain in heat occurs twice during each 2 rotation - in the unit of time if T denotes the time of one ro- tation of the disk . T ' The heat produced , therefore , in the unit of time is ...
Page 29
... heat lost in a second by radiation must be equivalent to vis viva transformed into heat during the same time . The first may be calculated from Newton's law of cooling , which , owing to the small amount of the heating , may be ...
... heat lost in a second by radiation must be equivalent to vis viva transformed into heat during the same time . The first may be calculated from Newton's law of cooling , which , owing to the small amount of the heating , may be ...
Page 30
... heating the mean value t = 0.84 F. = 0 ° 46 C. , which holds for the disk coated by lampblack , we get the ther- mal radiation h = 0 · 0017 . This number contains no arbitrary unit of heat , but is con- nected solely with the so ...
... heating the mean value t = 0.84 F. = 0 ° 46 C. , which holds for the disk coated by lampblack , we get the ther- mal radiation h = 0 · 0017 . This number contains no arbitrary unit of heat , but is con- nected solely with the so ...
Page 55
... heat by radiation and conduction . But even in the smaller machines an inconvenient residuum of heat still remained when the machines were worked continuously for a considerable time , such as to render it desirable to adopt some means ...
... heat by radiation and conduction . But even in the smaller machines an inconvenient residuum of heat still remained when the machines were worked continuously for a considerable time , such as to render it desirable to adopt some means ...
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Popular passages
Page 77 - small particles of bodies certain powers, virtues, or forces, by which they act at a " distance, not only upon the rays of light for reflecting, refracting, and inflecting them, " but also upon one another, for producing a great part of the phenomena of nature?
Page 79 - All these things being considered, it seems probable to me that God, in the beginning, formed matter in solid, massy, hard, impenetrable, moveable particles, of such sizes and figures, and with such other properties, and in such proportions to space, as most conduced to the end for which He formed them...
Page 80 - ... to derive two or three general principles of motion from phenomena, and afterwards to tell us how the properties and actions of all corporeal things follow from those manifest principles, would be a very great step in philosophy, though the causes of those principles were not yet discovered: and therefore I scruple not to propose the principles of motion above mentioned, they being of very general extent, and leave their causes to be found out.
Page 206 - D'Alembert, was the Precession of the equinoxes and the Nutation of the earth's axis, according to the theory of gravitation.
Page 141 - I am purposing them, to be considered of and examined, an account of a philosophical discovery which induced me to the making of the said telescope ; and I doubt not but will prove much more grateful than the communication of that instrument ; being in my judgment the oddest, if not the most considerable detection which hath hitherto been made in the operations of nature.
Page 78 - In explaining the structure of solid bodies, he is of opinion, " that the smallest particles of matter may cohere by the strongest attractions, and compose bigger particles of weaker virtue ; and many of these may cohere and compose bigger particles whose virtue is still weaker ; and so on for divers successions, until the progression end in the biggest particles, on which the operations in chemistry, and the colours of natural bodies, depend, and which, by adhering, compose bodies of a sensible...
Page 77 - How these Attractions may be performed, I do not here consider. What I call attraction may be performed by impulse, or by some other means unknown to me. I use that Word here to signify only in general any Force by which Bodies tend towards one another, whatsoever be the Cause.
Page 80 - It seems to me farther, that these Particles have not only a Vis inertiae, accompanied with such passive Laws of Motion as naturally result from that Force, but also that they are moved by certain active Principles, such as is that of Gravity, and that which causes Fermentation, and the Cohesion of Bodies.
Page 449 - Herschel described the head of the Comet of 1811 to be of a greenish or bluish-green colour, while the central point appeared to be of a pale ruddy tint. The representations of Halley's comet at its appearance in 1835, by the elder Struve, are coloured bluish green, and the nucleus on October 9 is coloured reddish-yellow.
Page 77 - What I call Attraction may be perform'd by impulse, or by some other means unknown to me. I use that Word here to signify only in general any Force by which Bodies tend towards one another, whatsoever be the Cause. For we must learn from the Phenomena of Nature what Bodies attract one another, and what are the Laws and Properties of the Attraction, before we enquire the Cause by which the Attraction is perform'd.