CONTENTS of N° 248.— Fifth Series. 



I. The Latent Heat of Evaporation of Benzene. By E. H. 

 Griffiths, M.A., F.E.S., Sidney Sussex College, Cambridge, and 

 Miss Doeothy Marshall, B.Se., University College, London, page 1 



II. A Method of Comparing directly the Heats of Evaporation of 

 different Liquids at their Boiling-pointR. By Miss Doeothy 

 Maeshall, B.Sc, and Prof. W. Ramsay, Ph.D., F.R.S., University 

 College, London » 38 



III. The Eadial Cursor : a new addition to the Slide-Rule. By 



F. W. Lanchestee ; 52 



IY. Graphical Method for finding the Eocal Lengths of Mirrors 

 and Lenses. By Edwin IL Barton, D.Sc, E.R.S.E., Senior 

 Lecturer and Demonstrator in Physics at University College, 

 Nottingham 59 



V. A " Direct-reading " Platinum Thermometer. By Eollo 

 Appleyaed 62 



YI. On a Method of Drawing Hyperbolas. By Geoege J. 

 Buech, M.A. Oxon 72 



VII. Notices respecting New Books : — Prof. J. J. Thomsons 

 Elements of the Mathematical Theory of Electricity and Mag- 

 netism ; Mr. E. A. Geegoey's Exercise Book of Elementary Physics 



for Organised Science Schools etc 75, 76 



VIII. Proceedings of Learned Societies : — 



Geological Society : — Mr. J. E. Maee on the Tarns of Lake- 

 land ; Col. H. W. Feilden on the Glacial Geology of Arctic 

 Europe and its Islands — Part I. Kolguev Island 77 



IX. Intelligence and Miscellaneous Articles : — 



On Underground Temperatures at Great Depths, by Alexander 

 Agassiz 78 



On the Influence of Electrical Waves on the Galvanic Besist- 

 ance of Metallic Conductors, by H. Haga 79 



*** It is requested that all Communications for this Work may be addressed, 

 post-paid, to the Care of Messrs. Taylor and Francis, Printing Office, Eed 

 Lion Court, Fleet Street, London. 



