540 



Mr. E. H, M. Bosanquet on the 



[Feb. 8, 



half o£ Eajputana. In the fourth part are discussed the general distri- 

 bution (as regards both space and season) of temperature and rainfall, 

 and the variations of the wind ; first with respect simply to the physical 

 geography of the country, and then in combination with certain theore- 

 tical views, the elucidation of which, by means of the dynamical theory of 

 heat and the kinetic theory of gases, occupies much space. 



Nearly half the memoir is devoted to the work of the Col aba Observa- 

 tory, of the history of which a short sketch is given. The design of this 

 part is to give a compendious account of the results of a long and con- 

 tinuous maintenance of the Observatorj^ both in the shape of numerical 

 determinations of meteorological elements and of their periodical and 

 other variations, and in throwing light by means of these upon the phy- 

 sical conditions and actions which give rise to the observed relations be- 

 tween different phenomena, and to the variation of these relations with 

 time. 



In the course of the work the author introduces several new modes of 

 picturing clearly to the mind, and of representing graphically, the general 

 results of the various phenomena observed : he also develops a theory of 

 aerial circulation, including a dynamical theory of convection-currents, 

 which is original, and, so far as he knows, put forth now for the first 

 time. 



February 8, 1877. 



Dr. GUY, Vice-President_, in the Chair. 



The Presents received were laid on the table, and thanks ordered for 

 them. 



The following Papers were read : — 



I. On the Hindoo Division of the Octave^ with some ad- 

 ditions to the Theory of the Higher Orders.'' By R. H. M. 

 Bosanquet, Fellow of St. John's College, Oxford. Commu- 

 nicated by Prof. Henry J. S. Smith, Savilian Professor of 

 Geometry in the University of Oxford. Received J anuary 5, 

 1877. 



(Abstract.) 



Attention has been recently directed to the remarkable division of the 

 octave into 22 intervals, employed by the Hindoos. The paper com- 

 mences with a slight account of the Hindoo scales as thus derived. It is 



