LXVIII THE ROYAL SOCIETY OF CANADA 



the air has been measured, but it has not been possible to complete 

 the installation of the earth thermometers. 



All mercury used in barometers is now so carefully purified that 

 the most delicate tests give no trace of impurities, and all barometers 

 that become damaged through breakage of the tubes, etc., are re- 

 paired with a new tube and filled in the laboratory by a new process 

 which has given very excellent results. 



Agricultural Meteorology 



The division of Agricultural Meteorology has arranged with the 

 Department of Trade & Commerce to have the assistance and co- 

 operation of the Census & Statistics Office in collecting data regarding 

 wheat growth and the weather changes. Details of this arrangement 

 will be found described in the March number of the "Bulletin of 

 Agricultural Statistics". The experimental plots maintained on the 

 Dominion Experimental Farms are being continued for another year. 

 The data from these plots is now in hand from three successive seasons 



A preliminary article upon the results of the analysis up to the 

 present time will be found in the April number of the "Monthly 

 Bulletin of Agricultural Statistics." 



Seismological Observations 



The Milne Seismographs at Toronto and Victoria have been 

 successfully kept in operation throughout the year without change in 

 adjustment, both booms being kept at a period of 18 seconds. A 

 small, illuminating lamp introduced in the Victoria instrument, has 

 reduced the thickness of the centre line on the trace. Previously, 

 the line was so thick, it was impossible to detect small earth tremors. 



Toronto registered 144 earthquakes during the year, two of which 

 were very large, five of moderate character, and the remainder with 

 amplitudes from 0-1 to 2 mm. The largest were recorded on May 

 1st, and June 26th, with centres in the South Pacific Ocean and 

 were doubtless of submarine origin. The more moderate occurred 

 on June 8th, June 27th, August 16th, December 29th and February 

 13th, with centres generally in the Caribbean Sea region. The quake 

 on the 29th of December caused considerable damage and loss of life 

 in Guatemala, whilst that on February 13th practically destroyed 

 the Chinese city of Swatow with loss of life amounting to 10,000. 

 Victoria recorded 122 disturbances during the year. 



