ABSTRACT OF MINUTES 
OF THE PROCEEDINGS OF 
The Hamilton Association ' 
DURING THE 
SESSION OF 1902-1908. 
NOVEMBER 13th, 1902. 
The opening meeting was held with the new President, J. 
M. Dickson, in the chair. 
In his inaugural address that gentleman treated the meet- 
ing to an able review of the more recent advances made in 
chemical and physical sciences. 
The Camera Club, assisted by Rev. Dr. Marsh, afterwards 
gave an exhibition of lantern, slides. 
NOVEMBER 28th, 1902. 
A special meeting held with the President, J. M. Dickson, 
in the chair. 
Dr. Merchant, Principal of the London Normal School, 
gave an illustrated lecture on ‘“‘ Wireless Telegraphy.”’ The 
lecturer first described the two realms of matter and energy, 
and asked to which of these does Light belong. An experiment 
showed it to be a form of energy. ‘The effect of a prism on a 
ray of light was shown, and it was explained that the spectrum 
of color is produced by varying wave lengths. The number of 
light waves per second varies from 400 million millions to 800 
million millions, depending on the color of the light. Electric 
waves, often known as Hertz waves, are of the same character 
as licht waves, and are transmtited by the same medium. The _ 
