384 



Presents. 



Scliorlemmer (0.), F.R.S. Der Ursprung uud die Entwickelung der 

 Organisclien Chemie. 8vo. Braunschweig 1889. The Author. 



Vernon- Har court (L. F.) Some Canal, River, and other Works in 

 France, Belgium, and Germany. 8vo. Loudon 1889. 



The Author. 



Williamson (B.), F.R.S. , and F. A. Tarleton. An Elementary 

 Treatise on Dynamics. 2nd Edition. 8vo. London 1889. 



The Authors. 



Medallion Portrait of Mr. John Evans, Treas. R.S. Mr. Evans. 



Eleven mounted Photographs of Nebulae, &c. 



Mr. Isaac Roberts, F.RA.S. 



