INTRODUCTION. 



XI.VJI 



TAUi.i: xv. 

 Mean force of the wind at every hour of the </r/y, deduced from the term-day observation*. 



a One observation. 



6 Two observations. 



c Four observations. 



"Aim "in the journal are reckoned .5 ...... 1 = a pressure of .03 pounds per square foot ; 2=.10; 3=.50; 4 = 1.00; 5 



7 = 4.43; 8 = 6.03; 9 = 7.87; 10 = 9.96. 



1.97; 6 = 3.07} 



