OBSERVATIONS ON ATMOSPHERIC ELECTRICITY. 



585 



far as my observations went, I never obtained indications of negative electri- 

 city either in the clouds or round them ; but on some occasions I found the 

 positive charge very small, and I was irresistibly led to the conclusion that, on 

 the edge of a dissolving mist, the potential was lower than the normal, while in 

 a condensing mist it was higher than the normal. The following table shows 

 the chief readings that were made in mists : — 



No. 



1 

 Date. 



Hour. 



Reading. 



Remarks. 



1 



Jan. 



3 



I7 h 30 m 



90 





Thin driving mist. 



2 



j> 



7 



ll h 



91 





Thin mist all round. 



3 



j) 



it 



20 h 



85 





Thin driving mist. 



4 



jj 



>» 



21 h 



95 





Do. do. 



5 



jt 



8 



ll h 20 m 



47 





On edge of dissolving mist. 



6 



>> 



15 



12 h 



115 





Mist all gone. 



7 



»> 



» 



13 h 



142 





Heavy mist near. 



8 



>> 



>> 



13 h 10 m 



( 50 



to 



( 97 



( 46 



to 

 ( 27 



1 

 I 



) 



Mist passing in small quantities, and dissolving 

 over brow of hill. 













9 



>) 



)> 



13 h 30 m 



I 



In hollow below tents, more mist. 



10 



jj 



JJ 



13 h 40 m 



75 





At post pretty thick mist. 



11 







13 h 50 m 



22 





In hollow mist not so soon dissipated. 



12 



jj 



J) 



14 h 



110 





Post — pretty thick mist. 



13 







14 h 20 m 



29 





Thick mist all round. 



14 







15 h 



87 





Mist all round at a little distance. 



15 







16 h 



84 





Clear all round below, cloudy above. 



16 







17 h 



124 





Mist all round, and a little driving over the top. 



17 







18 h 



106 





Clear. Thin mist below. 



18 



j ] 



)> 



19 h 



74 





Clear. 



19 





9 



16 h 



120 





Mist in distance. 



20 







16 h 40 m 



49 





In hollow — mist drifting past and dissolving. 



21 



j, 



j) 



16 h 45 m 



70 





Do. Mist all past. 



22 





10 



15 h 



73 





Overcast. 



23 



») 



j> 



15 h 45 m 



136 

 ( 66 



I 



1 



At post thin mist driving past from N.E. 



24 



|| 





15 h 55 m 



I to 



On ridge to N.E. thin mist ; just on edge of cloud. 











1 59 



I 





25 



JJ 



>> 



16 h 



73 

 ( 160 



I 



Very constant — little mist. 



26 







17 h 



1 to 



Mist all round. 











( 128 



) 













( 133 



\ 

 \ 





27 



j j 



j. 



17 h 30 m 



\ to 



In pretty thick mist. 











( 145 





28 







18 h 



153 





In thick mist. 



29 







19 h 



100 



} 



Clear. Clouds on horizon, and a little sheet light- 



30 







28 h 



82 



ning on clouds below. 



31 







16 h 



150 





Thick mist all round, and drifting over the top. 



32 







16 h 20 m 



137 





Still thick mist. 



33 





11 



(17 h 



i 177 





Thick mist. 



34 





, j 



1 to 



<^ 125 





Break in mist. 



35 



JJ 



>) 



( 17 h 5 m 



( 166 

 ( 155 



) 



Mist on again. 



36 



J> 



j> 



18 h 



<^ to 

 ( 162 



} 



Thick mist. 



37 





j j 



19 h 



109 





Mist. 



38 



JJ 



j) 



20 b 



149 





Dense mist. 



, .1 



