﻿4« FIELD AND FOREST. 



dam board of health. Some very curious facts were elicited on this 

 subject. The dealers found that the blue color produced by adultera- 

 tion by pure water was obviated by the use of dirty water, and there- 

 fore actually used water from pools and cellars filled with typhus 

 germs. The municipal government did not prohibit the sale o 

 impure milk, but established a sliding scale of prices according to 

 amount of adulteration. Prof. Chandler stated that as a practical 

 question it had been found that in New York no adulteration but 

 water was used to any extent and consequently the lactometer was re- 

 liable for general purposes. 



Prof. Koenig's paper was on phenomena produced by the inter- 

 ference of sounds of unequal pitch, and was illustrated by apparatus 

 and diagrams without which it wouid be unintelligible. His style of 

 speaking was extremely rapid and nervous, showing complete famil- 

 iarity with his subject. 



Prof. T. A. P. Barnard of N. Y., submitted a report from the com- 

 mittee in relation to weights, measures, and coinage, advocating the 

 establishment of an international bureau of weights and measures, 

 without committing itself to any particular system, and also recomend- 

 ing that gold alone should be retained as the standard of value. 



On Wednesday evening at St. James Hall, the chairmen of sections 

 A and B delivered their addresses. Prof. Chas. A. Young of Dart- 

 mouth College, spoke on the history of astronomy in this country, 

 while Prof. Ed. S. Morse chose the history of mammals in connection 

 with the doctrine of evolution. 



And as if to set off these efforts a brilliant reception at the gallery 

 of Fine Arts closed the labors of the day. Thursday Prof. J. E. Hil- 

 gard as retiring president, delivered an interesting address on the 

 progress of science in this country, especially of the branch with 

 which the speaker was most intimately connected, viz., Geodesy and 

 the construction of maps. After the address, the association pro- 

 ceeded to the rooms of the Bufialo Club, where society met science, 

 and a brilliant evolution of light and beauty were the results of con- 

 tact. 



The increasing interest in the subject of microscopy, bore its legiti- 

 mate fruit in the formation of a subsection, and the election of Dr. 

 Ward of Troy as its chairman. The microscopic society of Buffalo 

 gave a reception at the rooms of the Grosvenor Library, at which 17 



