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acid action æther amount angle of incidence appears Atlantic axis Biotite Carpenter cent centims chemical colour column condensation conductor constant copper corundum crystals determined difference direction disk distance effect electricity electrode electromotive force equal equator equatorial experiments fact flow galvanometer gas-effect glass grating gravity Gulf-stream heat hemisphere hexagonal hydrogen inches increase inductor intertropical iron laminæ light liquid macling magnetic means measure mercury metals mica miles millim mineral molecules motion needle observed obtained ocean-currents oceanic circulation Oolite optical angle oxide oxygen palladium paper parallel particles phenomena Phil phlogopite plane plates platinum poles portion position pressure prism produced quantity ratio rays reflected resistance rotation selenium silver sound specific gravity spectrum stream supposed surface syren temperature theory thickness tion transparent tube vapour velocity vermiculite vibration vis viva water of crystallization winds wire
Página 59 - A plane superficies is that in which any two points being taken, the straight line between them lies wholly in that superficies.
Página 56 - SATURDAY REVIEW. Wilson (JM) — ELEMENTARY GEOMETRY. Books I. II. III. Containing the Subjects of Euclid's first Four Books. New Edition, following the Syllabus of the Geometrical Association. By JM WILSON, MA, late Fellow of St. John's College, Cambridge, and Mathematical Master of Rugby School.
Página 400 - Rive endeavoured to show that the effects observed might be attributed to oxidation ; but his experiments are not conclusive ; and to Sir W. Thomson belongs the credit of having established the fact by experiment, irrespective of his theoretical deductions from the facts of thermo-electricity. He thus describes his decisive experiment : — " A metal bar insulated so as to be movable about an axis perpendicular to the plane of a metal ring made up half of copper and half of zinc, the two halves being...
Página 135 - The second of these angles will be called the meridian-distance, and will be regarded as positive to the right, and negative to the left of the sun. Of course, the direction of the axis should continually change, so as to follow the sun ; but as great accuracy in the determination of the angles was not needed, it was found sufficient to readjust it every few minutes. Another advantage of this arrangement was, that the line of junction, being turned parallel to the axis, would always lie in the plane...
Página 111 - I have myself done any thing," he says, " to strengthen the doctrine, it has been by showing that polar cold, rather than equatorial heat, is the primum mobile of this circulation"*. The influence of the sun in heating the waters of the intertropical seas is, in Dr. Carpenter's manner of viewing the problem, of no great importance. The efficient cause of motion he considers resides in cold rather than in heat.
Página 368 - On a very slight examination it will appear that this immense starry aggregation is by no means uniform. The stars of which it is composed are very unequally scattered, and show evident marks of clustering together into many separate allotments...
Página 406 - R ence of potential to any extent ; and if the number of acid and alkaline cells be equal, we shall always end with a plate similar to that with which we began. Such a battery will exhibit a difference of potential between its two terminals when the circuit is opened, and will give a current when it is closed. In it we have nothing but chemical action to rely upon both for creating electromotive force and for maintaining the current. We have no dissimilar contacts ; and as the terminal plates are...
Página 433 - I shall consider these in their order. (1) That this immense mass of cold water came originally from the polar regions I, of course, admit, but that the whole is in a state of motion I certainly do not admit. There is no warrant whatever for any such assumption. According to Dr. Carpenter...
Página 62 - ... muslin, and connexion is made by a wire as usual. The vertical part of the copper plate, from a little above the liquid to the bend, should be varnished ; otherwise solution principally takes place there, which causes the horizontal part of the plate to drop off. Holes are made in the silver tray with the view of shortening the communication between the airsurface and the copper plate and of facilitating the movements of the salt in solution. The solution itself may be contained in a shallow...
Página 373 - May 20 had so far transcended the horns being on this day their equals and nothing more. The llth of June was employed in mastering still further the facts relating to the subsidence of the sound east and west of the Foreland— the cause of this subsidence being in part due to the weakening of the sonorous waves by their divergence into the sound-shadow, and in part to interference.