LXXVI THE ROYAL SOCIETY OF CANADA 



Atmospheric Physics. — Pilot Balloon work was carried on at 

 Toronto and Camp Borden, Ont., throughout the year and at Ottawa, 

 Ont., Roberval, P.Q., and High River, Alta., during the flying season. 

 New stations were opened at Halifax, N.S., and Victoria Beach, 

 Man., at the Aerodromes of the Air Board, and at Victoria, B.C., in 

 connection with the Meteorological Service. A book of tables for 

 readily obtaining the horizontal distance of the balloon from the 

 station at any minute was prepared and published. This book, in 

 conjunction with the special plotting board, enables the observer to 

 very quickly obtain the direction and velocity of the wind at various 

 heights. Balloons have been despatched regularly from these stations 

 whenever the weather permitted. The highest flight obtained at 

 Toronto was on the 13th July, 1921, when the balloon was followed 

 for 99 minutes and reached a height of 52,000 ft. The highest flight 

 obtained in Canada up to the present occurred on the 26th January, 

 1922, at Camp Borden, when the balloon was followed for 106 minutes 

 and reached a height of nearly 56,000 ft. 



Balloons carrying instruments were sent up from Woodstock, 

 Ont., on the international days and the recoveries were very good 

 until January, 1922, when six balloons were sent up and only two 

 found. To obtain upper air data in the West, arrangements were made 

 in October for sending up balloons with instruments from Calgary, 

 Aha., and of those sent up about half have been found. The inter- 

 national committee has altered the procedure in sending up the 

 balloons. Hitherto there were six consecutive flights in one month 

 of the year, three consecutive flights in three months and one flight 

 in each of the remaining months. According to the new procedure 

 there are to be but three definite periods of six flights each in the year, 

 and for one of the periods the ascents are to take place every twelve 

 hours. 



The Meteorological Service had undertaken, as their part of the 

 international programme in connection with Amunsden's Expedition, 

 to send an observer to Fort Good Hope, Mackenzie River district, 

 to take pilot balloon, meteorological and magnetic observations during 

 the year July, 1921-July, 1922. Although Capt. Amunsden has had 

 to postpone his part of the programme the Meteorological Service 

 carried out its part and sent Mr. Harold Bibby to Fort Good Hope. 

 He reached his destination on the 11th July and will return in July 

 of this year. The reports received by the winter mail indicate that 

 the instruments were all working satisfactorily. 



Two types of thermometers for use on board ship to take the 

 temperature of ocean water in the Pacific were tried out during the 



