xl PROCEEDINGS. 
proceeds inward with a semi-circular, elliptical or other proximate form 
of a curve, a radiating system of lines would be required to spring up 
whenever the divergence between two lines of precipitation exceeded 
twice the effective attractive distance of the aggregations of deposits. 
Thus there would result a radiating, spray-like deposit, the branches 
budding forth at points necessary to allow of the precipitation of all 
material within the range of the specific attracting force. It will 
be seen that the branching of each of these figures practically fills 
up its particular basin so as to accommodate the precipitating molecules 
within a proximately constant distance. 
He illustrated the same, or a similar principle, by enclosing between 
sets of two microscope glass slides, solutions of a variety of chemical 
salts, clipping the sides firmly together, and allowing the water to evapo- 
rate from the open margins all around. In many of these the salts 
were precipitated in more or less aborescent and vine-like forms starting 
from the open margin. Under the polariscope these forms were exhibited 
to those present, the various plays of color making the exhibition of 
popular interest. 
The President, Dr. Gitpin, then read a paper on the ‘‘ Undeveloped 
Coal Fields of Nova Scotia.” (See Transactions, p. 134). 
Remarks upon the subject were made by Mr. Dick, M. E. 
Firrh Orpinary MEETING. 
Legislative Council Chamber, Halifax, 9th March, 1896. 
The PRESIDENT in the chair 
The Skrcrerary was instructed to convey to His WorsHiP THE 
Mayor, the thanks of the Institute for the use of the City Council 
Chamber for recent meetings of the Society. 
A paper by Pror. L. W. Battery, Ph. D., entitled, “‘Some Illus- 
trations of Dynamical Geology in South-Western Nova Scotia,” was 
read by the Corresponding Secretary. It was illustrated by a number 
of photographs. (See Transactions, p. 180). 
The paper was discussed by Drs. MurpHy, MacKay, and GILPIN, 
Principal TRerry, and others. 
