March 21st, ip/6.] PROCEEDINGS. xxxiii 



xanthophylls and carotin. When the continuous spectrum was 

 finally projected on to the chlorophyll solution the fluorescence 

 was seen to be most marked in the neighbourhood of the chief 

 absorption band in the red, but again very distinct towards 

 the violet end, thus corresponding with the distribution of 

 photosynthetic activity so far as this has yet been determined. 



Dr. H. G. A. Hickling, F.G.S., exhibited a series of plates 

 and specimens illustrating the variation in the colour of 

 coal streaks in accordance with the varying proportions of 

 carbon in the coals, and also a number of samples of the 

 fluorescent solutions obtained by washing finely ground coal- 

 powder with benzine. He pointed out that the constituent of 

 the coal dissolved by the benzine appears to be more especially 

 characteristic of the bituminous or humic types of coal, little or 

 no colour being obtained when the Cannel coals or anthracites 

 are treated in the same way. 



Ordinary Meeting, March 21st, 1916. 



The President, Professor Sydney J. Hickson, M.A., D.Sc, F.R.S., 



in the Chair. 



A vote of thanks was accorded the donors of the books 

 upon the table. These included : — " Triangulation in West 

 Virginia, Ohio, Kentucky, Indiana, Illinois, and Missouri," by 

 A. L. Baldwin (Special Publication No. 30) (4-to., Washington, 

 1 91 5), and " Triangulatio?i along the Columbia River and the 

 Coasts of Oregon and Northern California,'' by C A. Mourhess 

 (Special Publication No. 31) (410., Washington, 19 1 5), presented 

 by the United States Coast and Geodetic Survey ; and " The 

 Athenazum Subject Index to Periodicals, ipij. Theology and 

 Philosophy" (4to., London, 19 16), presented by the Publishers. 



