146 



May 16, 1839. 



JOHN GEORGE CHILDREN, Esq., V.P., in the Chair. 



A paper was read, entitled " On the visibility of certain rays be- 

 yond the ordinary red rays of the Solar Spectrum." By J. S. Cooper, 

 Esq., in a letter to Michael Faraday, Esq., D.C.L., F.R.S., &c., 

 &c. Communicated by Dr. Faraday. 



The author states his having observed an extension of the red por- 

 tion of the solar spectrum, obtained in the ordinary way, beyond 

 the space it occupies when seen by the naked eye, by \'iewing it 

 through a piece of deep blue cobalt glass. He finds that the part of 

 the spectrum thus rendered perceptible to the right is crossed by 

 two or more very broad lines or bands : and obsei-ves that the space 

 occupied by the most powerful calorific rays, coincides with the si- 

 tuation of the red rays thus rendered visible by transmission through 

 a blue medium. The author expresses a regret that he has not had 

 sufficient leisure to pursue the investigation of these phsenomena. 



A paper was also in part read, entitled, " Fifth letter on Voltaic 

 Combinations, with some account of the effects of a large constant 

 Battery:" addressed to Michael Faraday, Esq., D.C.L., F.R.S., &c. 

 By John F. Daniell, Esq., F.R.S. 



The Society then adjourned over the Whitsun Recess, to m^eet 

 again on the 30th instant. 



