348 
Transactions of the Boyal Society of South Africa. 
Tables 9 and 10 give the hourly mean barometric pressures at 32° F. 
They are obtained from the records of the photobarograph, and have been 
reduced to agree with the control readings of the Observatory Standard 
Barometer. Table 9 contains the mean results for the greater ranges of 
temperature (a), and Table 10 those for the lesser ranges (/3). 
Tables 11, 12, give the hourly mean temperatures for the greater (a) 
and lesser (/3) ranges of temperature respectively. 
