xlviil PROCEEDINGS. 
are equivalent to the coal measures of Stellarton, according to his views 
given in the Report of the Geological Survey for 1886, which he did 
not appear to have since changed. 
These differences of opinion demonstrated that new information was 
being acquired, and was in the course of being assimilated by the 
geologists. But whether taking the upper slice from off our old 
slenderly developed Devonian and attaching it with its unconformity to 
the base of our corpulent Carboniferous is the true rectification of the 
old nomenclature, remained, perhaps yet to be indubitably determined, 
If the true order of superposition of rocks can be ascertained at any point 
from the observation of their actual bedding, the paleontologist must 
modify his hypotheses based on defective biological horizons observed 
elsewhere. so as to harmonize with the facts of the stratigraphist. It 
was the stratigraphist in the first place who determined the biological 
horizons for the paleontologist. But the paleontologist with his 
biological horizon becomes the supreme arbitrator where the strati- 
graphist is not sure of his base, or of the order of superposition. 
Pror. J. G. MacGrecor, communicated a paper, “On Laws of 
Dilution for Aqueous Solutions of Electrolytes.” 
THrrp OrpinaRyY MEETING. 
Legislative Council Chamber, Halifax 15th January, 1900. 
The Present in the chair. 
A communication was read from the Kianra INTERNATIONAL Con- 
GRESS OF NaviGATION, inviting the Institute to appoint a delegate to 
attend the meeting of the Congress to be held at Paris in July next. 
The matter was referred to the Council for action. 
JAMES Barwes, Ese, B. A., Dalhousie College, presented two 
papers :— 
1. ‘On the Relation of the Viscosity of Mixtures of Solutions of 
Certain Salts to their State of Ionization.” (See Transactions, p. 113). 
2. ‘On the Calculation of the Conductivity of Aqueous Solutions 
containing Hydrochloric and Sulphurie Acids.” (See Transactions, p. 
129.) 
A vote of thanks was presented to Mr. Barnes for his communica- 
tions. 
