On the Sul- Mechanics of the Universe. 425 



February l.>, 1902. 

 Sir WILLIAM HUGGINS, K.C.B., D.C.L., President, in the Chair. 



A List of the Presents received was laid on the table, and thanks 

 ordered for them. 



The following Papers were read : 



I. " On the Sub-Mechanics of the Universe." By Professor OSBORXK 

 KEYNOLDS, F.R.S. 



II. " On Chemical Statics and Dynamics under the Action of Light." 

 By Dr. MEYER WILDERMAX. Communicated by Dr. LUDWK; 

 MOND, F.R.S. 



III. " Preliminary Note on a Method of Calculating Solubilities, Equili- 



brium Constants of Chemical Reactions, and Latent Heats of 

 Vaporisation." By Dr. A. FINDLAV. Communicated by Pro- 

 fessor RAMSAY, F.R.S. 



IV. " The Refractive Indices of Fluorite, Quartz, and Calcite." Bv 



J. \V. GIFFORD. Communicated by Professor S. P. THOMPSON, 

 F.R.S. 



" On the Sub-Mechanics of the Universe." P>y OSBOUXK RKYXOLKS, 

 F.R.S. Received February ">, Read February !.", 1901?. 



(Abstract.) 



Secfionx. 



I. Introduction Sketch of the results obtained and the steps secured. 

 II. Tlio general equations of motion of any entity. 



III. The general equations of motion in a purely mechanical medium, for ma.<>s. 



momentum, and energy. 



IV. The equations of continuity for component systems of motion. 

 V. The mean and relative motions of a medium. 



VI. The approximate equations of component systems of mean- and relative- 

 motion. 

 VII. The general condition for the continuance of component systems of mean- 



and relative-motion. 

 VIII. The conducting properties of the absolutely rigid granule-ultimate aton: 



or primordium. 

 IX. The probable ultimate distribution of the members of granular media, as the 



result of encounters, when there is no merin motion. 



X. Extensions of the kinetic theory to include rales of conduction of momentum 

 and energy through the grains, when the medium is in ultimate condition 

 and under no mean strains. 

 XT. The redistribution of angular inequalities in the relative system. 



