{^November 2nd, iSpy.] PROCEEDINGS. ix 



existence of inter-glacial man. They are, however, merely the 

 result of the decay of the wood and are not artificial. 



Professor Dawkins also showed under the microscope a 

 section of Fardel coal, showing a resinous stem or knot from the 

 original carboniferous plant, while the rest had gone to form the 

 black substance of the coal. 



Professor Weiss made some remarks on Professor Dawkins' 

 exhibit, attributing the destructive action to the fungus Tramefes 

 pifit, and explained the manner in which the fungus was able to 

 reach and destroy the centre of the tree. 



Professor Weiss then exhibited a specimen of Plowrightia 

 7norbosa, the black-knot, on a branch of the cherry, collected in 

 Canada, where it has been the cause of considerable destruction 

 of cherry trees. 



Professor Weiss also exhibited fructifications of Peziza 

 ceruginosa, the green-rot of the oak which he had quite recently 

 collected at New Abbey, near Dumfries. 



In the discussion which followed, and which turned mainly 

 upon the colouring-matter of the wood-fungi, the President, 

 Professor Reynolds, Dr. G. H. Bailey, Dr. F. H. Bowman, and 

 Mr. Stirrup took part. Professor Dixon referred to a paper read 

 at the British Association Meeting, at Montreal, in 1884. 



Professor H. B. Dixon, F.R.S., described some experiments 

 in obtaining photographs of explosion-flames, the first attempts 

 having been made abroad, and also some later attempts of his own. 

 Slides, showing the course of the explosion flames in tubes, were 

 exhibited by the electric lantern, and the character of the 

 explosion as indicated by the photographs was remarked upon. 



Professor Reynolds, Professor Lamb, Dr. C. H. Lees, and 

 Mr. Gwyther took part in the discussion upon the exhibition. 



