300 



Prof. 0. Reynolds. 



[Apr. 8, 



Gulliver (George), F.R.S. Notes of Researches in Anatomy. Physi- 

 ology, Pathology, and Botany. 8vo. Canterbury 1880. 



The Author. 



Liversidge (A.) Disease in the Sugar Cane, Queensland. 12mo. 

 Sydney. And a Volume containing twenty-one Pamphlets by 

 Professor Liversidge. The Author. 



Spratt (Rear- Admiral T.), F.R.S. A Suggestion for the Improve- 

 ment of the Entrance to the Mersey. 8vo. London 1880. 



The Author. 



April 8, 1880. 



THE PRESIDENT, followed by Mr. WARREN DE LA RUE, 



in the Chair. 



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

 for them. 



The following Papers were read : — 



I. " Note on Thermal Transpiration." By O. Reynolds, F.R.S. , 

 Professor of Engineering in Owens College, Manchester. 

 In a Letter to Professor Stokes, Sec. R.S. Communicated 

 by Professor Gr. G. Stokes. Received October 25, 1879, 



Owens College, 23rd October, 1879. 



Deae Sie, 



I have just received a copy of a paper by Professor Maxwell from 

 the " Philosophical Transactions of the Royal Society," read April 11, 

 1878, " On the Stresses in Rarefied Gases." To this paper I find that 

 there is an appendix added in May, 1879, in the course of which he 

 refers to my investigation in the following words : — 



" This phenomenon, to which Professor Reynolds has given the 

 name of Thermal Transpiration, was discovered entirely by him. . . . 

 It was not till after I had read Professor Reynolds's paper that I began 

 to reconsider the surface conditions of a gas, so that what I have done 

 is simply to extend to the surface phenomena the method which I think 

 most suitable for treating the interior of the gas. I think that this 

 method is, in some respects, better than that adopted by Professor 

 Reynolds, while I admit that his method is sufficient to establish the 

 existence of the phenomena, though not to afford an estimate of their 

 amount." 



As the abstract of my paper does not contain a sufficient account of 



