222, Proceedings. 



Ordinary Meeting, February 24th, 1891. 



James Bottomley, B.A., D.Sc, F.C.S., Vice-President, 



in the Chair. 



The thanks of the members were voted to the donors of 

 the books upon the table. 



Mr. Francis Jones, F.R.S.Ed., F.C.S., and Mr. 

 Samuel Okell, F.R.A.S., were appointed auditors of the 

 Society's accounts for the current year. 



Professor OsBORNE REYNOLDS gave an account of a 

 phenomenon observed in the engineering laboratory of the 

 Owens College in connection with the dense fog which had 

 prevailed during the day. Some new belting had been 

 kept running from eleven to three o'clock at the rate of 

 about 40 to 50 miles per hour. The belting was new and 

 bright when started, but on being stopped was found to be 

 quite black, being loaded with dirt collected during its rapids 

 passage through the foggy air. It was much the dirtiest 

 thing in the laboratory. Professor REYNOLDS pointed out 

 the analogy to the dirtiness of an express train, the pheno- 

 menon in both cases being due to the fact that a rapidly 

 moving body comes in contact with a greater quantity of 

 air in a given time than a stationary body, and therefore 

 picks up a greater quantity of atmospheric pollution. 



Professor REYNOLDS also exhibited two harmonic 

 analysers affording a means of ascertaining the periods of 

 free vibration of structures^cirJ^pLembers of structures, and 

 communicated the substance of a paper on the subject. 



Mr. Faraday read the first portion of a paper entitled, 

 " Thoughts on Credit Money, and on the function of the 

 Precious Metals as Distributors of Wealth." 



