THE HAMILTON ASSOCIATION. 1 3 



and studying microbes, and by the aid of models and illustrations 

 with the lime light pointed out the characteristics of the varieties 

 associated with cholera, tuberculosis, fevers and other diseases. 



Dr. J» D. Macdonald, in moving a vote of thanks to Professor 

 Wright, referred to the many subjects of dispute between the schools 

 which had been settled by the revelations of the microscope. The 

 motion was seconded by Thos. Mcllwraith, and carried. 



The chairman having announced the subject of the next paper, 

 the meeting adjourned. 



THURSDAY, OCTOBER 8th, 1891. 



SPECIAL MEETING. 



B. E. Charlton in the chair. 



The Council recommended that applications for membership 

 be received at special as well as regular meetings. No objection 

 being made, four applications were read. 



Col. C. C. Grant read the paper of the evening, entitled " Notes 

 on Fossil Silurian Plants." The paper was illustrated by a number 

 of specimens from the Museum. 



Thos. Mcllwraith, delegate of the Association to the meeting 

 of the Royal Society of Canada, in Montreal, last May, then gave an 

 account of that meeting. 



After the usual announcements the meeting adjourned. 



THURSDAY, OCTOBER 22nd, 1891. 



SPECIAL MEETING. 



A. T. Neill, First Vice-President, in the chair. 



As there was no other business before the meeting, W. H. 

 Ballard, M. A., proceeded at once with the reading of his paper, 

 " How We Measure." In a paper read before the Association some 

 time since, Mr. Ballard dealt somewhat fully with the origin of our 

 units of measurement of time, length and weight. His purpose in 

 this was to show that our other measurements are all reducible to 

 these three. The units of surface and volume are derived directly 

 from that of length ; the units of capacity, density and specific grav- 

 ity ffom those of weight and volume. The measurement of uniform 

 or accelerated velocity implies a consideration of time and length • 



