172 REPORT—1849, 
Upon consulting Table LXXXII. it will be seen that in most instances 
the months March to October inclusive present tensions considerably lower 
in value than those of the remaining four months, and in connexion with this, 
Table LXXXI. informs us that in June, July and August, all the tensions 
were low. The means have accordingly been taken for January, February, 
the eight months of low tension, November and December ; they are exhibited 
in the following table. 
TasLe LXXXIII. 
Mean electrical tension (high, or above 60 div.) at each observation-epoch 
for the months specified in the year 1844. 
Epoch. | January. |/February. ee November.|December.| Mean. 

406°6 . . 348-1 325°7 
TABLE LXXXIV. 
Differences between the mean electrical tension (high, or above 60 div.) at 
the four daily epochs for the months specified in the year 1844. 





Epoch. January. | February. team November. | December. | Mean. 
div. div. div. div. div. div 
Sunrise to9a.m.| +229°8 +281°4 +317°4 +1331 +856 | +191°6 
9am.to3pm. | —227°3 +140°0 —126°2 —105°9 +37°7 | — 28°5 
3 p.m. to sunset.| --139°2 —120°0 — 33:3 — 24:6 +389 |+ 263 
eee eee ———— ee 
TasBLe LXXXV. 
Excess or defect of the mean electrical tension (high, or above 60 diy.) at 
each observation-epoch, as compared with the means of the winter months 
and also with the means of the eight months of low tension and of the 
entire year. 
eS See ee ee ee 



Epoch. January. | February. ee November. | December. | Mean. 
div. div. diy. div. , _ div. div. 
Sunrise .........06+ — 82-4 — 208-0 —155°5 —52°3 —96°4 | —126°9 
Grass eas caarecsss +147-4 + 73°4 +161°9 +80°8 —108 | + 647 
D Pills. cscccueenve — 799 +213°4 + 35:7 —25°1 +269 | + 36:2 
Sunset ......sc.00- + 59:3 + 934 + 24 —49°7 +65°3 |+ 62°5 
These tables confirm the general result of the discussion of the high ten- 
sions in 1845, 1846 and 1847, viz. the trregularity of the movements above 
60 div. In the four months specified the quantities are affected by precisely 
the same signs as those in Tables LXXIX. and LXXX., with only one excep- 
tion, and thus we bave additional evidence that the higher tensions materially 
influence the aggregate results. 
Low tensions.—Upon omitting the high readings above specified, we obtain 
a series of numbers considerably in accordance with those recorded in Tables 
XXXIV. XXXV. XXXVI. and XXXVII. 

