PHILOSOPHICAL TRANSACTIONS. 



Part III, 1883. 



Contents. 



XXII. On the Ciliated Groove (Siphonoglyphe) in the Stomodseuin of 

 Alcyonarians. By Sydney J. Hickson, B.A. 



XXIII. On the Determination of the Number of Electrostatic Units in the 

 Electromagnetic Unit of Electricity. By J. J. Thomson, M.A. 



XXIY. The Development of Eenilla. By Edmund B. Wilson, Ph.D. 



XXV . On the Continuity of the Protoplasm through the Walls of Vegetable 

 Cells. By Walter G-aedinee. B.A. 



XXVI. Supplement to former Paper, entitled — " Experimental Inquiry into the 

 Composition of some of the Animals Eed and Slaughtered as Human 

 Food."— Composition of the Ash of the entire Animals, and of certain 

 separated parts. By Sir J. B. Lawtes, Bart., and Dr. J. H. G-ilbebt. 



XXVII. The Baeeeian Lectuee. — On Eadiant Matter Spectroscopy: The 

 Detection and wide Distribution of Yttrium. By W. Ceookes, F.E.S. 



XXVIII. On a new Crinoid from the Southern Sea. By P. Heebeet Cae- 

 pentee, M.A. 



XXIX. An Experimental Investigation of the Circumstances which detennine 

 w hether the Motion of Water shall be Direct or Sinuous, and of th 

 Law of Besistance in Parallel Channels. By Professor Osboene 

 Eeynolds, E.E.S. 



Index to Volume. 



Price £1 12s. 



Extra volume (vol. 168) containing the Eeports of the Naturalists attached to the 

 Transit of Venus Expeditions. Price £3. 



Sold by Harrison and Sons. 



Separate copies of Papers in the Philosophical Transactions, commencing with 1875 

 may be had of Triibrer and Co., 57, Ludgate Hill. 



