16 Report, Sfc. 



of Ferns to the Society, which had been placed in the Vaughan 

 Library. 



The exhibitions were : — 



Pharoah's Baker's Bread Stamp. . . . . . . By Ayre. 



Atacamite, supposed by some to be part of a Meteorite. 



Stigmaria. . . . . . . By Mb. Faerae. 



Mr. Hayward then delivered some remarks on the various 

 forms of Force, (or, as it is better expressed, of Energy) and 

 their mutual convertibility. The great principle that matter is 

 indestructible so that no change in material objects involves either 

 addition to or subtraction from the store of matter previously 

 existing, is the foundation of Chemistry as a science. Recently 

 the corresponding principle, that Energy is indestructible, has 

 become, under the name of the Principle of the Conservation or 

 Persistence of Energy, a well-established axiom of Physics. 

 Already it has led to many important theoretical and practical 

 consequences, and a firm grasp of it is essential to the student of 

 physical science in its more recent developments. Mr. Hayward 

 endeavoured to explain and illustrate this principle, pointing out 

 that almost every source of terrestrial energy, on which man draws 

 for the work which he wishes to effect, is ultimately traceable to 

 energy, which was originally radiated from the sun in the form of 

 heat. 



Tliursday, February 14th, 1867. 



The Twenty-second Meeting of the Society was held at Mr. Bull's 

 House. 



Money was elected a member of the Society. 



The objects exhibited were : — 



The Saw of the Sawfish. 



Shell of the Paper Nautilus. . . . . . . By Mr. Farrar. 



Some specimens of rare Lepidoptera. . . . . By Mr. Bull. 



A paper was then read by Ward on the Sense of Smell. 



