106 TRANSACTIONS OF THE 



seemed to prove that 140 deg. was the greatest heat which any 

 germs could withstand. Pasteur's infusions had been examined 

 with too low microscopic power, and other observers had, with 

 higher magnifying powers, found life in infusions in which Pasteur 

 had failed to detect any. 



Considerable discussion followed the reading of this paper, and 

 one member said that a new observer. Dr. Drysdale, stated that 

 germs were not all killed by a temperature of 250 deg. Fahr. 



14th September, 1875. 

 Mr. James Allan, Vice-President, in the chair. 



SPECIMENS EXHIBITED. 



By Mr. R. H. Paterson. — An erratic form of Chrysanthemum 

 leucanthemum, having the outer florets tubular and barren instead 

 of being ligulate and female ; also two specimeiis of Scahiosa suc- 

 cisa having two of the florets enlarged into secondaiy heads like 

 the Hen-and-chicken Daisy. This might be accounted for either 

 by supposing that the central footstalk had become contracted or 

 tliat two florets had become enlai'ged. This interesting subject 

 deserves attention. Mr. Paterson also exhibited a specimen of 

 the fungus Hypochinus j^lumosa from Victoria, presented by Mr. 

 George Thompson. 



By Ml". George Horn. — A specimen of the hop in flower got 

 near Uddingston; also some rare plants from Sutherland and 

 Caithness. Among these were Primula Scotica (both forms), 

 Saussurea alpina Decandolle, Hippophae rhamnoides, Car ex 

 aquatilis, var. watsoni, Elymus arenareus, Menziesia cerulea, 

 Lycopodium annotinum, the last two from the Sow of Athol. 



EXCURSION. 



Mr. M'Kay gave an account of the excursion to Stevenston on 

 the 11th. Nothing of interest was got, and the district seemed to 

 be barren in all branches. 



PAPER READ. 



Mr. George Horn read an interesting account of the Society's 

 excursion to Sutherland. They had gone over a large tract of 



