Sold by Harrison and Sons, St. Martin's Lane. 



PHILOSOPHICAL TRANSACTIONS. 



Price £1 3s., with 26 Plates. 

 Series A. Containing Papers of a Mathematical or Physical Character. 

 Vol. CLXXVIII (1887). 



Price £1 16$., with 33 Plates. 

 Seeies B. Containing Papers of a Biological Character. 

 Vol. CLXXVIII (1887). 



The Papers in each Series can also be purchased separately and are published by 

 Triibner & Co., 57, Ludgate Hill. Prices Is. to 3s. 



Cloth cases for binding the above volumes can be obtained of Harrison and Sons, 

 St. Martin's Lane. Price 1*. 6d. 



