penter, and other naturalists, who have seen them, to be of 

 great value, particularly the transparent animals, such as 

 medusa rhysostoma, oceana, &c., the delicate tissues of which 

 had never before been preserved, and Avhich, consequently, are 

 not to be seen in any museum or collection. The main ingre- 

 dient made use of is bay salt, a minute quantity of corrosive 

 sublimate, about two grains to a quart of the solution, being 

 added to prevent vegetation. There can be no doubt of its 

 success, provided the necessary care and attention are bestowed ; 

 but it is necessary first to use a weak solution, repeatedly 

 changing it to a stronger till it is nearly saturated with bay 

 salt. The time required for this is the oidy drawback, as on 

 an expedition, where there woidd be sufficient employment for 

 a naturalist following the ordinary plan, there would be abun- 

 dant occupation for another individual in preserving the 

 objects in a way to do them justice. Alum is occasionally 

 added to the solution with advantage, where there is no car- 

 bonate of lime contained in the specimen to be preserved, but 

 the use of it requires some practical experience ; and indeed 

 no rules can be given capable of being applied generally, as 

 most classes of animals require, more or less, a particular 

 treatment.'" 



The thanks of the Society were voted to Mr. M Andrew, 

 and the Secretary was directed to inform him of the fact. 



Dr. Inman then read a short paper on the Causes that 

 determine the Fall of Leaves. 



After adverting to the different theories which had been, 

 from time to time, propounded to explain this phenomena — 

 the necessity there was for distinguishing between the death 

 of a leaf and its fall — and the important distinctions to be 

 drawn between articulated and non-articulated leaves, he pro- 

 ceeded to say — 



"The articulations arc those parts of the plant, where, at 



