The London, Edinburgh and Dublin Philosophical Magazine and Journal of ScienceTaylor & Francis, 1888 - English periodicals |
Contents
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Common terms and phrases
acid action æther angle annealing anode armature Avogadro's law bismuth bubble calculated calf carbon centim centimetres chemical circuit coil conductors configurations constant contact-angle containing copper crystal density determined diameter difference direction discharge edit effect electricity electrodes electrolytic electromotive force energy equal equation error experiments film finite formula galvanometer Gay-Lussac's law given glass heat Hence incidence increase index of refraction induction iron junction light lines liquid magnetic force magnetic susceptibility Maxwell's means measured metal method millim millimetres molecular molecules nickel observed obtained osmotic pressure oxide paper Phil plane plate platinum polarization potential prisms produced Prof quantity Radians rays reflected reflexion refraction resistance solid solution specific gravity spectrum steel strain substance surface temperature theory thickness tion Treatise tube velocity viscous volume wave wave-length wire
Popular passages
Page 544 - Camus (M?) Treatise on the Teeth of Wheels, demonstrating the best forms which can be given to them for the purposes of Machinery, such as Mill-work and Clock-work, and the art of finding their numbers. Translated from the French, with details of the present practice of Millwrights, Engine Makers, and other Machinists, by ISAAC HAWKINS.
Page 255 - ... only on an atomic constant and the field strength and is independent of the orientation of the coil in the magnetic field, no calibration is required; it is necessary only to have a frequency standard at the ground station. Although the frequency is independent of orientation, the signal amplitude is proportional to the square of the sine of the angle between the coil axis and the magnetic field; when this angle is 45°, the amplitude is reduced to one-half its maximum value, and at 0° no signal...
Page 1 - The GEOMETRICAL CONSTRUCTION of a CONIC SECTION, subject to five Conditions of passing through given Points and touching given Straight Lines, deduced from the Properties of Involution and Anharmonic Ratio ; with a variety of General Properties of Curves of the Second Order.
Page 230 - ... mention is made in the paper. With reference to the Laurentian, he maintained its claim to be regarded as a regularly stratified system probably divisible into two or three series, and characterized in its middle or upper portion by the accumulation of organic limestone, carbonaceous beds, and iron-ores on a vast scale. He also mentioned the almost universal prevalence in the northern hemisphere of the great plications of the crust which terminated this period, and which necessarily separate...
Page 477 - ... assume quite a luminous appearance, I rubbed it smartly with the hand, and found it readily gave out bright sparks, accompanied with distinct cracks. " Don't you see this ? " said I. " The white men did not show us this," he replied ; we had it long before white men came into the country, we and our forefathers of old.
Page 541 - Notes and diagrams illustrative of the directions of the forces acting at and near the surface of the earth, in different parts of the Brunswick tornado of June 19, 1835.
Page 223 - The jar discharges at A in the ordinary way, and simultaneously a longer spark is observed to pass at B at the far end of two long leads. Or if the B ends of the wire are too far apart to allow of a spark, the wires glow and spit off brushes every time a discharge occurs at^.
Page 208 - Thus we may suppose that in a certain number of groups the ordinary agitation of the molecules is liable to accumulate so much that every now and then the configuration of one of the groups breaks up, and this whether it is in a state of strain or not.
Page 17 - CASEY.— A TREATISE ON THE ANALYTICAL GEOMETRY OF THE POINT, LINE, CIRCLE, AND CONIC SECTIONS.
Page 53 - ... true and definite contact EMF, but are dependent in some degree on the manner in which the surfaces are brought together and separated. The experiment of Canton in 1753 (where the rough and polished parts of a glass tube became oppositely electrified when rubbed with the same cloth) seems to point in the same direction. Professors Ayrton, Schuster, SP Thompson, and J. Perry discussed the points raised, and it was considered that direct experiment on contact electromotive force in a very perfect...