ON ELECTRICAL OBSERVATIONS AT KEW. 173 
The following table exhibits the distribution of the low readings in the 
year 1844, upon which the mean quantities in Table LX XXVII. are based. 
Taste LXXXVI.—Number of positive readings (low tension) at each obser- 
vation-epoch in each month of the year 1844. 
Epoch. | Jan.} Feb./Mar.| April.|May.| June.| July. | Aug. Sept. | Oct. Nov.}|Dec.|Sums. 


—_2$€ | | |_| —— 
Sunrise..| 20 | 17 | 23 | 25 | 31] 30 30 | 28 | 22 | 26 | 17/ 19 | 288 
9am....| 20} 19 | 24 | 24) 30] 30 30 | 28 | 23 | 28 | 15 | 17 | 288 
3p.m....| 20 | 23 | 26] 28 | 30 | 27 26 | 27 | 25 | 26 | 20 | 16 | 294 
Sunset ..| 20 | 19 | 26 | 29 | 29} 29 28 | 28} 25 | 26 | 21 | 16 | 296 
Sums ...| 80 | 78 | 99 | 106 |120 | 116 
114 |111 | 95 106 | 73 | 68 |1166 




The numbers in this table are perfectly in accordance with those entering 
into the discussion of the low tensions of 1845, 1846 and 1847, in exhibiting 
the greatest quantity in the summer months. 
Tasie LXXXVII. 
Mean electrical tension (low, or below 60 div.) at each observation-epoch in 
each month of the year 1844, with the monthly and yearly mean tensions. 

Epoch. | Jan.| Feb.|Mar.| April.|May.| June.) July.) Aug.| Sept.| Oct.|Nov.| Dec.| Mean. 







— |_———_—| —— | —__ | ___ 

div. | div. | div.| div. | div.| div. | div. | diy.} diy. | div.| div. | div.| div. 
Sunrise .| 23-0] 26°1) 13°8) 18°4 | 11-1) 12°7| 17:3] 25-8) 14-5 | 21-0] 26°1] 31-1] 19-2 
9 a.m....| 40°1] 51°6| 37°2| 54°5 | 23:2) 24°9| 38:5 | 38-1] 37°7 | 37-7| 47°5| 52-4) 38°9 
3 p.m....| 43°9] 49-6) 35-8) 24:3 | 12:0) 18°1 | 20°8 | 23 8) 35-1 | 28-3) 40:9] 55-9] 30°6 
Sunset ..| 48-7] 48:0} 42°9} 39-3 | 26°3) 34°6| 38-3] 40-1] 46-3 | 43-6] 42°9] 59-7| 41-4 
——— —— |_| | | 
Means...| 38:9] 44°6| 32°9) 33:9 | 18-5) 22°6| 28-8 32-0] 33-5 | 32-7| 39-4] 49-0] 32-6 




Taste LXXXVIII.—Differences between the mean electrical tension (low, 
or below 60 div.) at the four daily epochs in each month of the year 1844. 

Jan.| Feb.|Mar.| April.|May.|June. | July. |Aug.| Sept. |Oct. [Nov.|Dec.|Mean. 


















div. | div. | div. | div. | div | div. div. | div. | div. | div. | div. | div. | div. 
+ 
+i/+}+])/ 4+ }/+]} 4+] 4/4] +/}4/4 
$.R. to 9 a.m....|17*1 |25°5 [23-4 | 36-1 |12-1| 12-2 | 21-2 |12-3 | 23-2 [16-7 |21-4 ait 19-7 
+ - =_ _ _ _ — _— —_ eo — — 
9am.to 3 p.m..| 3°8| 2:0} 14] 30:2 /11:2} 68 | 17-7 |14:3} 2:6 | 9:4] 66 ae 8:3 
+/—|+]}+]+] 4+] 4] 4 
3 p.m. to S.S....) 4°8] 1:6} 7:1] 15:0 }14°3| 16°5 | 17-5 116-3 itp 183 Ar 38 108 
Tasie LXXXIX.—Excess or defect of the mean electrical tension (low, or 
below 60 div.) at each observation-epoch, as compared with the mean of 
each month and also with the mean of the year. 
ee et a ee ee a ly 
Epoch. jJan. |Feb. |Mar.|April. |May.|June. | July. |Aug.| Sept. |Oct. [Nov.|/Dec.|Mean. 
(—— ———— | << |§ —<—<—_ | ——___ |__| _— | 
div. | div. | div. | div. | div. | diy div. | div. | div. | div. | div. | div. | diy. 
Sunrise ./15°9 aa 19°1] 15:5 | 7-41 9-9 | 11:5. | 6-2 19:0 117 13-3 17-9 13-4 
+ +) +}+]/+]+]+ 
9 a.m....| 1:2} 7:0] 4:3] 20°6 | 4:7 | 2°3 | 97 | 61 os aa 8 -. 73 
+i+}1+)—/-}—|-|-|+]/—]4]4] - 
3 p.m.... ae 7 aH 96 }6°5 | 45] 8-0 |8-2 | 1:6] 4:4] 15 6:9} 2:0 
+/+) 4] 4/4 
Sunset ..| 9°8} 3°4/10°0| 541781120] 9:5 19-1 aa ea 25 107 de 
