Elements of physical manipulation, Volume 1Houghton, Osgood and Company, 1879 |
Common terms and phrases
abscissas accuracy accurate amount angle of incidence angular aperture aperture Apparatus attached axis barometer beam brass called Canada balsam centre coincide color column compute construct contour lines cross-hairs crystal curve determined diameter distance divided draw equal error Experiment eye-piece focus friction gives graduated circle hole horizontal hydrometer inches index of refraction instrument intervals latter length lens lenses liquid marked measure mercury meter method micrometer microscope millimetre minute mirror moving nearly Nicol's prism object object-glass observations obtained opthalmoscope paper parallel pass piece placed plane of polarization plate of glass polariscope polarized light position pressure reading reflected refraction remove rendered residual curve retina right angles scale scale-pan screw side slide slit specific gravity spherometer square surface telescope temperature tenths tube turn varying velocity vernier vertical vibrations visible volume weight wire
Popular passages
Page 134 - ... that the ratio of the sines of the angles of incidence and refraction is constant for refraction in the same medium, was effected by Snell and Descartes.
Page 141 - C are each i — r, in which i is the angle of incidence and r the angle of refraction, and...
Page viii - The principle upon which it is proposed to solve this problem is, that the proposed observations should be rejected when the probability of the system of errors obtained by retaining them is less than that of the system of errors obtained by their rejection multiplied by the probability of making so many, and no more, abnormal observations.
Page 88 - ... movable clips placed on the coils. Since the oscillator generates quite a strong second harmonic at least over its higher range, the actual frequency variation is from 75 to 500 megacycles. The over-all length of the oscillator including tubes is about nine inches. It is mounted on a movable base in such a way that it may be raised or lowered at will. In order to demonstrate that the field of the 2-3 16A oscillator is indeed of the inverted symmetrical type, a curve was plotted like that in Fig....
Page v - Now, according to Art. 11, the most probable system of values of x, y, z.... (and, consequently, the most probable system of errors) is that which makes the sum of the squares of the errors a minimum: thus, we are to reduce to a minimum the function [vv~] = v'v' + v"v" + v'"v'" + .... Regarding [rr] as a function of the variables x,y,z...
Page 98 - It is, however, customary to assume that the air is saturated with moisture, and at the same temperature as the water with which it is in contact.
Page 42 - Make this weighing with care, and repeat two or three times, as when observing the upper point. Subtract each of the weights when the vessel was full, from the mean of those last taken, and the difference gives the weight of the water contained between the lower point and each of the other observed levels. Now to determine the volume, we have given by Kater, the weight of 1 cubic inch of distilled water at 62° F., and 30 inches pressure, equals 252.456 grains, and 1 gramme equals 15.432 grains....