vni 



Page 



Contributions to the Anatomy of the Hirudinea. By Alfred Gibbs 



Bourne, B.Sc. Lond., University Scholar in Zoology, and Assistant in 

 the Zoological Laboratory, University College, London 350 



Eeply to a Note by Professor J. E. Eeynolds on the Atomic "Weight of 

 Glucinum or Beryllium. By T. S. Humpidge, Ph.D., B.Sc 358 



Eemarks on Spectrum Photography in Belation to New Methods of 

 Quantitative Chemical Analysis. Part I. By W. N. Hartley, F.E.S.E., 

 Professor of Chemistry, Eoyal College of Science, Dublin 359 



On a New Standard of Illumination and the Measurement of Light. By 

 W. H. Preece, F.E.S 359 



List of Presents 360 



Observations on the Colouring-matters of the so-called Bile of Inverte- 

 brates, on those of the Bile of Vertebrates, and on some unusual Urine 

 Pigments, &c. By Charles A. MacMunn, B.A., M.D 370 



Experimental Determinations of Magnetic Susceptibility and of Maxi- 

 mum Magnetisation in Absolute Measure. By E. Shida, Thomson 



Experimental Scholar, University, Glasgow 404 . 



On the Effect of Electrical Stimulations of the Frog's Heart, and its Modi- 

 fication by Heat, Cold, and the Action of Drugs. By T. Lauder 

 Brunton, M.D., F.E.S., and Theodore Cash, M.D 455 



Index 497 



Obituary Notices : — 



Professor William Stanley Jevons i 



Friedrich Wohler xii 



Francis Maitland Balfour xx 



