146 Miscellaneous Intelligence. 
from the observations at mieeson that the easterly disturbances exceeded 
the westerly in every month. The average value of a westerly distur- 
bance is greater than that of an easterly in every month at St. wee ena 
gree, Toronto has awk me peculia rit 
Arranging, the disturbances into = several hours of their occurrence, 
the hours of the day are found to be those of greatest disturbance in a 
.very considerable degree ; the sum sie the nse during the twelve 
hours of the day, being about seven times as great as the sum of those 
in the twelve hours of the night at St. Helena, and about 2°6 times as 
great at the Cape of Good Hope ; while at Hobarton the sum of the 
twelve night ratios slightly exceeded the day; at Toronto the excess 
was larger, viz: as 13to 1. The laws of easterly and westerly dis- 
turbances, i in relation to the local hours, are then examined separately. 
At St. Helena and the Cape, the easterly day-disturbances exceed the 
easterly night- wcll att and the westerly day-disturbances exceed 
the westerly night- damarntioes: These results are compared with those 
at poo and Hobarton 
At elena, withotigh but comparatively few disreiliadicen occur 
during the night hours, those disturbances are almost all westerly (183 
which 174 were westerly and but nine easterly). In the day hours the 
westerly only s/ight/y exceed the easterly disturbances. At the Cape, 
the westerly excess is less in the night and greater in the et wo at 
Ll. Sto and the night excess mach greater than the day ex 
At St. Helena, the fact of the disturbances being more aneen in 
the dost thaws in the night is consistent in every month of the pea 3 = 
appears worthy of remark when it is remembered that at St. Helen 
the curve of the diurnal variation of the declination is sate eneuaea 
at two = gt periods of the year; i orresponding to the 
ronto, the mean effect is westerly in the day and easterly in the night; 
at Hobarton, easterly i in the day and westerly i in the —_— 
Mod 
best, permitting us, as it does, to ascertain witha great me of accu- 
racy and certainty, the since: limits of penetrating and separating pow” 
er possessed by a microscope, and hence easily to express anally 
te ~~ qualities in. the most varied circumstances. 
This method consists simply in subjecting to observation under the 
Ja toubin the dioptric images of certain apes objects instead of the 
See 
= ae 
