18 



J. F. Miller, Esq., on the 



Hygrometers. 







3 



P.M. 





Weight of 



Vapour in 



a Cubic 



Required 



for satura- 



Degree of 

 Humidity, 



1852. 











tion of a 



(complete 



Saturation 



1-000). 





Dry 

 Bulb. 



Wet 

 Bulb. 



Deduced 

 Dew- 

 Point. 



Comple- 

 ment of 

 Dew Point. 



Foot of 

 Air. 



Cubic Foot 

 of Air. 





o 



o 



o 



o 



Grains. 



Grains. 





January 



42-95 



41-36 



39-43 



3-52 



3-02 



0-39 



0-886 



February 



43-03 



40-79 



38-16 



4-87 



2-88 



0-53 



•846 



March 



46-67 



42-37 



37-67 



9-00 



2-81 



1-02 



•733 



April 



54-28 



47-04 



39-68 



14-60 



3-05 



1-84 



•619 



May 



57-07 



52-39 



49-13 



7-94 



4-10 



1-24 



•768 



June 



61-69 



56-53 



52-86 



8-83 



4-62 



1-58 



•746 



July 



70-46 



63-80 



60-46 



10-00 



5-84 



2-28 



•721 



August 



66-66 



61-59 



58-54 



8-12 



5-54 



1-69 



•768 



September 



60-60 



55-50 



51-93 



8-67 



4-48 



1-50 



•750 



October 



51-36 



47-85 



44-35 



7-01 



3-51 



0-95 



•788 



November 



46-72 



44-47 



42-03 



4-69 



3-28 



0-55 



•855 



December 



46-42 



45-05 



43-56 



286 



3-45 



0-36 



•905 



1852, 



53.99 



49-89 



46-48 



7-51 



3-88 



1-16 



0-782 



1851, 



52-36 



48-77 



45-74 



6-62 



3-07 



1-76 





1850, 



52-35 



48-46 



45-17 



7-18 









1849, 



52-00 



48-21 



44-91 



7-09 



3-61 



1-10 





1848, 



51-93 



48-23 



44-98 



6-95 









1847, 



51-94 





44-12 



7-82 









Terrestrial Radiation. 







Absolute Minima. 



Mean Nocturnal 

 Temperature. 



Terrestrial Radiation. 



1852. 



Six's Ther- 

 mometer, 

 4 feet 



above the 

 Ground. 



On 

 Wool, 



on 

 Grass. 



Six's Ther- 

 mometer, 



4 feet 

 above the 

 Ground. 



On 

 Wool, 



on 

 Grass. 



Max. 



Min. 



Mean. 



January, 



February 



March, 



April, 



May, . 



June, . 



July, . 



August, 



Septembe 



October, 



Novembei 



December 



> • 



o 



31-5 



26-5 



25-5 



32-5 



36- 



43- 



52- 



50- 



40- 



34-5 



265 



32- 



o 



21-2 



9- 



8-8 

 15- 

 21-5 

 32-5 

 42-5 

 36- 

 23-5 

 22-5 

 16- 

 21- 



o 



39-43 

 37-07 

 36-95 

 40-63 

 44-87 

 51-13 

 58-72 

 54-93 

 50-70 

 43-58 

 42-02 

 42-42 



o 



32-84 

 28-47 

 26-25 

 26-83 

 36-20 

 42-88 

 53-24 

 48-03 

 42-15 

 34-50 

 3614 

 36-43 



o 



13- 



17-5 



19- 



19- 



17- 



16- 



12-5 



17- 



16-5 



14- 



10-5 



11-5 



2-0 

 1-5 

 4-5 

 1-5 

 10 

 4-0 

 1-0 

 1-0 

 3-0 

 3-0 

 00 

 00 



6-59 

 8-60 

 10-70 

 13-80 

 8-67 

 8-25 

 5-48 

 6-90 

 855 

 9-08 

 5-88 

 5-99 



1852, 

 1851, 

 1850, 

 1849, 

 1848, 

 1847, 

 1846, 





35-8 

 351 

 33-5 

 33-7 

 32-5 

 33-7 

 361 



22-4 

 23-3 

 208 

 18-8 

 20-2 

 20-5 

 23-1 i 



45-20 

 44-39 

 44-07 

 44-15 

 43-79 

 43-50 

 45-75 



3699 

 36-86 

 36-26 

 3505 

 3573 

 35-95 

 38-30 



15-3 

 16-3 

 15-2 

 18-4 

 15-9 

 15-1 

 14-6 



19 

 1-8 

 1-0 

 2-2 

 1-9 

 1-1 

 14 



8-20 

 7-53 

 7-80 

 9-09 

 8-06 

 7-45 

 7-45 



