20 Proceedings. 



Ordinary Meeting, October 31st, 1893. 



Professor Arthur SCHUSTER, Ph.D., F.R.S., F.R.A.S., 

 President, in the Chair. 



The thanks of the members were voted to the donors 

 of the books upon the table. 



Mr. Faraday exhibited some specimens of yarn as soiled 

 by fog in the process of spinning. 



Dr. LANGDON exhibited specimens of the salt of tech- 

 nical chlorophyll, which were believed to be the copper salt. 



Professor WEISS exhibited raspberry canes bearing a 

 second crop of fruit, and shoots of the apple bearing a 

 second crop of flowers. He also exhibited specimens 

 of a monstrous wallflower, which was considered by De 

 CANDOLLE to be a separate variety, and named Cheiranthus 

 Cheiri, var. gynantheriis. The abnormal condition is due to 

 the transformation of the stamens into carpels which are 

 often fused round the true ovary. 



Mr. P. J. HARTOG read a paper, by himself and Dr. 

 HARKER, describing a form of apparatus by means of 

 which they have measured the latent heat of steam. The 

 authors wish the results, which have so far been very con- 

 cordant and give a value distinctly lower than that found 

 by Regnault, to be considered preliminary only, until they 

 have been able to extend their observations. 



A paper on a new sporiferous spike, apparently of the 

 Calamarian type, from the Lancashire coal measures, by 

 Messrs. T. HlCK and James LOMAS, was also read. The 

 specimen was found near Oldham. 



