Manchester Memoirs, Vol. xlvi (\go2), No. 14. 5 



of uranium, and Stroi"ne}er 56 for cadmium, the modern 

 determinations for these elements being 240 and 112 

 respectively. (3) Scheele's oxymuriatic acid was shown 

 by Davy to be elementary chlorine. (4) Crookes classified 

 thallium with the sulphur group and, subsequently, with 

 mercury, while it has since been proved by others to 

 belong to the group represented by scandium, gallium 

 and indium, as shown in my Tables. (5) Platinum was 

 identified by its Brazilian discoverer with silver and 

 derived its name from that metal. Many similar instances 

 may be adduced from other departments of the natural 

 sciences. It will be sufficient to mention in this con- 

 nexion, the discovery and first appearance of Saturn's 

 rings, the supposed cometary nature of the planet 

 Uranus, and the landfall of Columbus. 



