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. GILPIN, 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. 



FIFTH ORDINARY MEETING. 



Legislative Council Chamber, Halifax, 9th March, 1896. 

 The PRESIDENT in the chair 



The SECRETARY 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 PROF. L. W. BAILEY, 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 TREFRY, and others. 



