1 66 



CARNEGIE INSTITUTION OF WASHINGTON. 



Relative Humidity at Mount Wilson. 



°o7 



month. 



April. 



8 a. m. 



6 p. m. 



May. 



a. m. 6 p. m. 



June. 



6 p. ni. 



July. 



a. ni. 6 p. m. 



August. 



a. ni. 6 p. m. 



I.. 



2.. 



3-. 

 4" 

 5- 

 6.. 



7" 

 8.. 



9- 



10.. 



n.. 



12.. 



i3" 



14.. 



15" 

 16.. 

 17.. 

 18., 

 19.. 

 20.. 

 21.. 

 22.. 



23" 



24.. 



25- 

 26.. 



27" 



28.. 



29" 



30" 

 3I" 



Means. 



100 

 96 

 60 

 92 



63 



60 



29 



100 



100 



100 



46 



58 



85 

 100 



73 

 79 

 98 



65 



50 



68 



100 



100 



100 



36 



71 



57 

 34 

 46 



38 

 29 

 36 

 18 



15 

 22 



36 

 36 

 41 

 32 

 23 

 27 



34 

 25 

 46 



41 

 42 

 28 

 37 

 38 

 100 

 100 

 37 

 38 

 23 

 14 

 30 



80 

 80 

 66 



49 



38 

 40 



31 

 22 



24 

 41 

 38 

 54 

 40 

 64 

 29 



19 



38 

 66 

 64 



100 

 45 

 43 

 32 

 50 



100 

 48 

 38 

 33 

 15 

 47 

 35 



40 

 39 

 39 

 24 

 20 

 27 

 29 

 23 

 20 

 21 

 19 



52 

 32 

 34 

 33 

 32 

 31 

 56 



45 

 40 



44 

 42 

 30 

 28 

 27 

 42 

 35 

 30 



36 

 39 

 41 

 25 

 24 

 42 

 41 

 29 



34 

 21 



17 



43 

 42 

 30 

 30 

 24 

 41 

 42 

 72 

 53 

 43 

 54 

 32 

 27 

 25 

 36 

 35 

 30 

 37 



34 

 23 

 30 

 38 

 34 

 45 

 49 

 33 

 42 



57 

 29 

 46 



25 

 30 

 50 



22 



21 



24 

 35 

 31 

 33 

 38 

 31 

 30 

 50 



24 

 38 

 32 

 56 

 42 

 43 



18 



24 

 40 

 22 

 25 



44 



16 

 24 

 19 

 42 

 34 

 35 

 26 

 50 

 27 

 50 

 32 

 46 



77 



43 



34 



33 



22 

 22 

 29 

 32 

 40 



34 



64 



4t 



28 



30 

 53 

 61 



67 



54 



37 

 40 



34 

 32 

 23 

 37 

 58 

 79 

 77 

 69 



67 

 40 



43 

 21 



27 

 14 



43 



27 

 33 

 30 

 40 



43 

 43 

 76 

 58 

 46 

 35 

 33 

 65 

 64 

 72 

 45 

 36 

 30 

 45 

 46 

 40 

 33 

 85 

 79 

 56 

 58 

 37 

 43 

 33 

 29 

 14 

 31 



The marked dryness of the atmosphere on Mount Wilson during 

 the summer months may be best appreciated by comparing these 

 results with those obtained by the Weather Bureau at Washington 

 during the corresponding period. 



Relative Humidity at Washington. 



* Mean maximum and mean minimum humidity not determined. 



