CONTENTS. 



PAOH 



1. On some Anomalies in Zoological and Botanical Geo- 



graphy. By Alfred R. Wallace, . 1 



2. On the Slaking of Quicklime. By John Davy, M.D., 



F R.S. Lond. and Edin., . . . .15 



3. Some Observations on the Blood, chiefly in relation to 



the question, Is Ammonia in its volatile state one of 

 its Normal Constituents ] By John Davy, M.D., 

 F.R.S. Lond. and Edin., &c., . . .20 



4. On the Relative Effects of Acid and Alkaline Solutions 



on Muscular Action through the Nerve. By H. F. 

 Baxter, Esq., Cambridge, . . . .29 



5. On the Antiquity of Man; a Review of "Lyell" and 



"Wilson." By J. W. Dawson, LL.D., F.R.S., 

 F.G.S., Principal of M'Gill College and University, 

 Montreal. Communicated by the Author, . . 40 



6. The Observed Motions of the Companion of Sirius 



considered with Reference to the Disturbing Body 

 indicated by Theory. By T. H. Safford, Assistant 

 at the Observatory of Harvard College. Communi- 

 cated by the Author, . . . .64 



7. Notes on the Fertilisation of Orchids. By William 



Rutherford, M.D., President of the Royal Medical 

 Society, Resident Physician Royal Infirmary. (Being 

 a portion of a thesis, for which a gold medal was 

 awarded by the Medical Faculty of the University of 

 Edinburgh at the Graduation in 1863), . . 69 



