117 



May 22, 1856. 

 The LORD WROTTESLEY, President, in the Chair. 



The following communications were read : 



I. " On the Application of Photography to the physiognomic 



and mental phenomena of Insanity." By HUGH W. DIA- 

 MOND, M.D. Communicated by Admiral SMYTH, For. 

 Sec. R.S. Received April 23, 1856. 



(Abstract.) 



The position of the author, as Medical Superintendent of the Surrey 

 Lunatic Asylum, has enabled him to make the peculiar application 

 of Photography, of which he gives an account in the present commu- 

 nication. He points out the advantages to be derived from photo- 

 graphic portraits of the insane, as faithfully representing the features 

 of the disease in its different forms, or its successive phases in the 

 same patient, and as affording unerring records for study and com- 

 parison by the physician and psychologist. In the course of the 

 paper frequent reference is made to the series of photographic por- 

 traits of lunatic patients with which it was accompanied. 



II. " On the Problem of Three Bodies." By the Rev. J. CHALLIS, 



M.A., F.R.S., F.R.A.S., Plumian Professor of Astronomy, 

 and Experimental Philosophy in the University of Cam- 

 bridge. Received May 15, 1856. 



(Abstract.) 



The object of the author is to give an approximate solution of the 

 Problem of Three Bodies, equally applicable to the motion of the 

 moon and to that of a planet, in which the forms of the develop- 

 ments of the radius-vector, longitude, and latitude in terms of the 



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