332 



Transactions of the Canadian Institute. 



[Vol. VII. 



property to a greater degree than a solution containing only a single 

 salt, but of equal concentration. It is thus, probably, with this compli- 

 cated solution known as sea-water. 



After the conclusion of the experiment described above, owing to 

 some rather peculiar results as show^n by the figures in the tables of 

 weights given, it was thought advisable to continue the experiment for 

 some time longer and to add another, — a fourth specimen of iron. This 

 was a piece of piano wire, bright and clean. The other specimens, being 

 now rusted, were cleaned with emery paper, — the rust being removed in 

 this way — and after being carefully weighed were again placed under 

 the jars. An interesting phenomenon had developed, in consequence, 

 probably, of the change in humidity of the room in which the 

 experiment was conducted, due to the increased firing necessary to heat 

 the building. (The experiments were carried on in the basement of the 

 university museum where during autumn there is considerable humidity 

 in the atmosphere and where, when extra heating is required, the 

 atmosphere in the basement becomes very dry). 



Samples A, B, C, were of coarse iron wire, well cleaned. 



Samples D, E, F, were of finer soft iron wire, well cleaned. 



Samples G, H, I, were of 98.8^ pure iron wire, well cleaned. 



Samples O, P, Q, were of fine piano wire. 



Samples A, E, H, O, under jar No. i (sea-water). 



Samples B, F, I, P, under jar No. 2 (salt solution). 



Samples C, D, G, Q, under jar No. 3 (distilled water). 



The weighings are given in grams. 



Table I. 



