XC'IV 



THE ROYAL SOCIETY 01" CANADA 



A. = Height in miles to beginning of Isothermal. 



B.= Temperature Fahrenheit at l>eginning of Isothennai. 



C.= Greatest height in miles reached by balloon. 



D.= Temperature Fahrenheit at greatest height. 



E. s Direction balloon travelled at starting point. 



F. s Distance in miles of point where balloon fell from .starting j^oint. 



G. = Bearing of point where balloon fell from starting point. 



The past year ha.s been very unsatisfactory for solar ladiation 

 observations. These observations can only be obtained on clear days 

 and in consequence there have been A'ery few during the year. The 

 difficulties were further increased by a thick haze that made its appear- 

 ance during the latter part of June and which has not 3'et disappeared. 

 This has delayed the completion of the comparison of the Callendar 

 Sunshine Recorder and the Angstrom Pyrheliometer which was com- 

 menced in 1911. In March a few hours were obtained one day to make 

 observations, and it is hoped that comparison will be completed in .\piil. 



Magnetic Oh.seuv.\tions. 



There have been no breaks in the Magnetic records at theAgincourt 

 ( )bservatory during the fiscal year ending March 31st, 1913. The zeros 

 of the photographic recording instruments were determined by absolute 

 observations taken weekly for Declination and twice a month for 

 Hoi'izontal Force. Inclination observations were also made weekly 

 with the Toepfer Earth Inductor. 



The westerly declination has increa.sed from ()° 12'.(j in .March, 

 1912, to G° 17'. in March, 1913. 



The Hoiizontal Force has decreased from 0. 16181 C.G.8. units to 

 0.10148 units and the Inclination has increased from 74° 40'. to 



