PROCEEDINGS OF 

 THE ROYAL SOCIETY. 



vol, xlii. No. 254 



CONTENTS. 



PAGE 



Further Experiments on the Distribution of Micro-Organisms in Air (by 

 Hesse's method). By Pebcy F. Fbankland, Ph.D., B.Sc., F.C.S., 

 and T. G-. Haet, A.E.S.M. (Plate 3) 267 



April 21, 1887. 



I. On Phosphonium Chloride. By Sidney Skinner, B.A., Scholar of 



Christ's College, Cambridge . . 283 



II. On the Principal Electric Time-constant of a Circular Disk. By Hoeace 

 Lamb, M.A., F.E.S., Professor of Pure Mathematics in the Owen3 

 College, Victoria University 289* 



III. On Parts of the Skeleton of Meiolania platyceps (Ow.). By Sir Eichabd 



Owen, KC.BI, F.E.S., &c 297 



IV. Some Applications of Dynamical Principles to Physical Phenomena. 



Part II. By J. J. Thomson, M.A., F.E.S., Fellow Of Trinity College 

 and Cavendish Professor of Experimental Physics in the University of 

 Cambridge , . 297 



V. Conduction of Heat in Liquids. By C. Cheee, B.A., King's College, 



Cambridge ♦ . . . . 30O 



List of Presents . . . . , 302 



For continuation of Contents see 4<th page of Wrapper. 



JUN 2 1817 



Price Two Shillings. 



