The London, Edinburgh and Dublin philosophical magazine and journal of science . liMeditationis est perscrutari occulta; conteinplationis est .... Adrniratio generat quasstionem, qusestio investigationem,iuvestigatio inventionem.—Hugo de S. Victore. Cur spireut veuti, cur terra dehiscat. Cur mare turgescat, pelago cur tantus ainaror,Cur caput obscura Plicebus ferrugine condat,Quid toties diros cogat flagrare cometas,Quid pariat nubes, veniant cur fulmina ccelo,Quo rnicet igne Iris, superos quis conciat orbesTarn vario motu. J. B. Pinelli ad Mazoniwm. ALERE I \ *s C
The London, Edinburgh and Dublin philosophical magazine and journal of science . liMeditationis est perscrutari occulta; conteinplationis est .... Adrniratio generat quasstionem, qusestio investigationem,iuvestigatio inventionem.—Hugo de S. Victore. Cur spireut veuti, cur terra dehiscat. Cur mare turgescat, pelago cur tantus ainaror,Cur caput obscura Plicebus ferrugine condat,Quid toties diros cogat flagrare cometas,Quid pariat nubes, veniant cur fulmina ccelo,Quo rnicet igne Iris, superos quis conciat orbesTarn vario motu. J. B. Pinelli ad Mazoniwm. ALERE I \ *s CONTENTS OF VOL XLV. (FIFTH SEEIES). NUMBEE CCLXXII.—JAKTJABY 1898. PageProf. H. Nagaoka on Diffraction Phenomena in the Focal Plane of a Telescope with Circular Aperture, due to a Finite Source of Light 1 Mr. W. Sutherland on the Belative Motion of the Earth and JEther 23 Mr. C. F. Brush on the Transmission of Eadiant Heat by Gases at Varying Pressures. (Plates ) 31 Mr. W. H. Macaulay on the Stresses and Deflection of Braced Girders 42 Prof. H. A. Eowland on Electrical Measurement by Alter-nating Currents. (Plate XIX.) 66 Messrs. A. A. Michelson and S. VT. Stratton on a new Harmonic Analyser. (Plates ) 85 Prof. AV. Stroud on a Telemetrical Spherometer and Foco- meter 91 Prof. J. Trowbridge on High Electromotive Force 98 Messrs. J. Trowbridge and J. E. Burbank on Phosphorescence produced by Electrification 100 Mr. J. Eose-Innes on the Isothermals of Ether 102 Mr. J. H. Michell on the Wave-Besistance of a Ship 106 On the Conductivity of Carbon for Heat and Electrilondonedinburgh5451898lon
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