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analyser appear axis bands beam become called centre circle circular coincident colours combination complementary complete consequently consists containing cross crystal dark depend described direction divided double edges effect emerge equal examined exhibit experiments extinguished extraordinary fact field figures former give given glass hand incident inclined increases intensity left-handed less light means motion move natural nearly Nicol observed opposite optic axes ordinary original overlap pair parallel particle passing perpendicular phase phenomena placed plane plane of polarisation plane of reflexion plane of vibration plate polarisation polarised light portion position present principal prism produced quartz question reflected refraction remains represent respectively result retardation right angles right-handed rings rotation seen selenite sets side similar spectrum successive Suppose surface thickness tints tion tourmalin traversed tube turned round varies various vibrations wave length wedges
Page 147 - SOUND : a Series of Simple, Entertaining, and Inexpensive Experiments in the Phenomena of Sound, for the Use of Students of every age.
Page 148 - MATHEMATICAL AND PHYSICAL PAPERS, By GEORGE GABRIEL STOKES, MA, DCL, LL.D., FRS, Fellow . of Pembroke College, and Lucasian Professor of Mathematics in the University of Cambridge. Reprinted from the Original Journals and Transactions, with Additional Notes by the Author. Vol. I. Demy 8vo. cloth. 15*.
Page 147 - With numerous Illustrations. Crown 8vo. y. 6d. POLARISATION OF LIGHT. By W. SPOTTISWOODE, FRS With many Illustrations. Second Edition. Crown 8vo. 3*. 6d. ON BRITISH WILD FLOWERS CONSIDERED IN RELATION TO INSECTS.
Page 147 - By Sir WILLIAM THOMSON, •DCL, LL.D., FRS, FRSE, Fellow of St. Peter's College, Cambridge, and Professor of Natural Philosophy in the University of Glasgow. Second Edition. Medium 8vo. iSs. THE MOTION OF VORTEX RINGS, A TREATISE ON. An Essay to which the Adams Prize was adjudged in 1882 in the University of Cambridge.
Page 147 - THE SCIENCE OF WEIGHING AND MEASURING, AND THE STANDARDS OF MEASURE AND WEIGHT. By HW CHISHOLM, Warden of the Standards. With numerous Illustrations. Crown 8vo. 4*.
Page 125 - ... and 90° the rings will be contracted and extended in opposite quadrants, until at 45° they are divided by two diagonals, on each side of which the colours are complementary. Beyond 45° the rings begin to coalesce, until at 90° the four quadrants coincide again.
Page 147 - THE COMMON FROG. By ST. GEORGE MIVART, FRS, Lecturer in Comparative Anatomy at St Mary's Hospital. With numerous Illustrations. Crown 8vo.
Page 134 - Lord Rayleigh, and others ; and the combinations have been effected sometimes by causing two spectra at right angles to one another to overlap, and sometimes by bringing images of various parts of a spectrum simultaneously upon the retina. Latterly also W.