NO. 17.] 



THE TENSION OF AQUEOUS VAPOUR. 



501 



From these Tables and the diagrams on PI. VI. (1 cm. = 0"1 mm.) are 

 taken out the epochs and the values of the diurnal Minima and Maxima, and 

 the diurnal Range as shown in the following Tables. 



Minimum. 

 Hour. 1 Dev. 



Maximum. 



Hour. 



Dev. 



Range. 



January 



February 



March 



April 



May 



June 



July 



August 



September .... 



October 



November 



December 



Winter 



Spring 



Summer 



Autumn 



Dark Season . . . 

 Sunny Season . . 

 Equinoct. Months 



Year 



3'5 a. m. 



3 a. m. 

 2-5 a. m. 

 2 a. m. 



4 a. m, 

 a. m. 

 a. m. 

 a. m. 

 a. m. 

 p. m. 

 p. m. 

 a. m. 



3 a. m. 



3 a. m. 



2 a. m. 



2 a. m. 



2'5 a. m. 

 2 a. m. 

 1'5 a. m. 



2'5 a. m. 



- 4-2 



- 2-6 



- 7-4 

 -11-5 

 -19-8 

 -13-8 



- 6-7 



- 9-8 

 -14-1 



- 1-7 



- 0-3 



- 1-8 



- 2-6 

 -12-4 



- 9-5 



- 5-2 



- 1-9 

 -11-5 

 -10-8 



- 7-5 



p. m. 



p. m. 



p. m. 



p. m. 



p. m. 

 3'5 p. m. 

 2 p. m. 



p. m. 



S? 



Noon 



10 p. m. 



2'5 p.m. 



8 p. m. 

 3'5 p. m. 

 2 p. m. 



2 p. m. 



Noon 



3 p. m. 



2 p.m. 



3 p. m. 



- 2-2 



1-5 



3-5 



9-0 



13-6 



11-3 



7-3 



9-3 



10-9 



2-5 



1-5 



0-9 



1-3 



8-4 

 91 

 4-3 



11 



9-7 

 6-8 



5-6 



0-064 

 0-041 

 0-109 

 0-205 

 0-3.34 

 0-251 

 0-140 

 0-191 

 0-250 

 0-042 

 0-018 

 0027 



0039 



0-208 

 0-186 

 0095 



0-030 

 0-212 

 0-176 



0-131 



