Vll 



April 23, 1874. 



Pag 



On some Points connected with the Circulation of the Blood, arrived at 

 from a Study of the Sphygmograph-Trace. By A. H. Garrod, B.A., 

 Fellow of St. John's College, Cambridge ; Prosector to the Zoological 

 Society 291 



Note on the Minute Anatomy of the Alimentary Canal. By Herbert 

 Watney, M.A. Cantab 293 



On the Kefraction of Sound by the Atmosphere. By Prof. Osborne Rey- 

 nolds, Owens College, Manchester 295 



April 30, 1874. 



The Structure of the Mucous Membrane of the Uterus and its Periodical 

 Changes. By John Williams, M.D. (Lond.), Assistant Obstetric Phy- 

 sician to University College Hospital 297 



On Leaf-Arrangement. By Hubert Airy, M. A., M.D 298 



On the Improvement of the Spectroscope. By Thomas Grubb, F.R.S 308 



May 7, 1874. 

 List of Candidates for Election into the Society 310 



Preliminary Experiments on a Magnetized Copper Wire. By Professor 

 Balfour Stewart, LL.D., F.R.S., and Arthur Schuster, Ph.D 311 



Note on some Winter Thermometric Observations in the Alps. By Prof. 

 E. Frankland, F.R.S 317 



Addition to the Paper, " Volcanic Energy : an attempt to develop its true 

 Origin and Cosmical Relations." By Robert Mallet, A.M., C.E., F.R.S., 

 M.R,I.A.,&c 328 



List of Presents 329 



On the Comparative Value of certain Geological Ages (or groups of Forma- 

 tions) considered as items of Geological Time. By A. C. Ramsay, 

 LL.D., V.P.R.S 334 



No. 153. May 21, 1874. 



On the Structure and Development of Pwipatus capensis. By H. N. 

 Moseley, M.A., Naturalist to the ' Challenger ' Expedition 344 



The Uniform Wave of Oscillation. By John Irnray, M. A., Memb.Inst.C.E. 850 



On Combinations of Colour by means of Polarized Light. By W. Spottis- 

 woode, M.A., Treas. & V.P.R.S 354 



Further Experiments on the Transmission of Sound. By John Tyndall, 

 D.C.L., LL.D., Professor of Natural Philosophy in the Royal Institution 859 



On some recent Experiments with a Fireman's Respirator. By John 

 Tyndall, D.C.L., LL.D., Professor of Natural Philosophy in the Royal 

 Institution . 359 



