CONTENTS OF VOL. XLV. FOURTH SERIES. Vll 



Page 

 Prof. D. Bierens de Haan on certain Early Logarithmic Tables. 371 

 Mr. J. W. L. Glaisher on Early Logarithmic Tables, and their 



Calculators 376 



Notices respecting New Books : — 



The Rev. T. W. Webb's Celestial Objects for Common 



Telescopes 382 



Mr. C. P. Smyth's Report presented to the Board of Visi- 

 tors of the Royal Observatory, Edinburgh 382 



Proceedings of the Royal Society : — 



Messrs. J. Dewarand W. Dittmar on the Vapour-density 



of Potassium 384 



Mr. C. Tomlinson on Supersaturated Saline Solutions . . 385 

 The Earl of Rosse on the Radiation of Heat from the 

 Moon, the Law of its Absorption by our Atmosphere, 



and its variation in amount with her Phases 390 



Proceedings of the Geological Society : — 



Dr. H. A. Nicholson on the Geology of the Thunder-Bay 

 and Shabendowan Minin g Districts on the North Shore 



of Lake Superior 391 



Dr. J. W. Dawson on the Relations of the supposed Car- 

 boniferous Plants of Bear Island with the Palaeozoic 



Flora of North America 392 



Mr. H. Woodward on Eocene Crustacea from Portsmouth, 



and on a new Trilobite from the Cape of Good Hope. 393 

 Mr. S. H. Wintle on an extensive Landslip at Glenorchy, 



Tasmania 393 



On a new Determination of the Velocity of Light, by M. A. 



Cornu 394 



New Experiments on Singing Flames, byFr. Kastner 397 



On a new Operation by which the Velocity of Projectiles can 



be determined Optically, by Marcel Deprez 398 



On the Development of Heat by the Friction of Liquids against 

 Solids, by O. Maschke 400 



NUMBER CCCIL— JUNE. 



Dr. H. Herwig on the Expansion of Superheated Vapours . . 401 

 Mr. 0. Heaviside on Duplex Telegraphy. (With a Plate.) . . 426 

 M. J. Jamin on the Theory of the Normal Magnet, and the 



Means of augmenting indefinitely the Power of Magnets . . 432 

 The Hon. J. W. Strutt on the Law of Gaseous Pressure .... 438 

 Mr. H. Wilde on some Improvements in Electromagnetic In- 

 duction Machines. (With a Plate.) .439 



Mr. T. Muir on the first Extension of the term Area to the 



case of an Autotomic Plane Circuit 450 



Dr. J. Percy on a Crystallized Compound of Sesquioxide of 

 Iron and Lime 455 



