32 The Forth-coming Transit of Venus. 



However, I fear I am getting into cloud-land, and, in 

 conclusion, I think I am warranted in saying that I have 

 shown that both Ideal Construction and the Introduction of 

 Metempirical Conceptions are processes of frequent employ- 

 ment arid of great value in Science, and that the thanks of 

 both physicists and logicians are due to Mr. Lewes for having 

 explicitly called attention to them. 



Art. IX. — On the Photographic Processes to be adopted 



in Observing the Transit of Venus. 



By R. L. J. Ellery, F.R.S., F.R.A.S. 



[Read 12th October, 1874.] 



