PHILOSOPHICAL TRANSACTIONS. 



Part III, 1883. 



. i-1 



Contexts. 



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

 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. 



XXIV. The. Development of Renilla. By Edmund B. Wilson, Ph.D. 



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

 Cells. By Walter Gardiner. B.A. 



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

 Composition of some of the Animals Fed and Slaughtered as Human 

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

 separated parts. By Sir J. B. Lawes, Bart., and Dr. J. H. Gilbert. 



XXVII. The Bakerian Lecture. — On Badiant Matter Spectroscopy : The 

 Detection and wide Distribution of Yttrium. By W. Crookes, F.B.S. 



XXVIII. On a new Crinoid from the Southern Sea. By P. Herbert Car- 

 penter, M.A. 



XXIX. An Experimental Investigation of the Circumstances "which determine 

 whether the Motion of Water shall be Direct or Sinuous, and of the 

 Law of Besistance in Parallel Channels. By Professor Osbobne 

 Eeynolds, F.B.S. 



Index to Volume. 



Price £1 12s. 



Extra volume (vol. 168) containing the Reports 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 Trubiier and Co., 57, Ludgate Hill. 



