Miscellaneous Intelligence. 437 
one degree ; except in- the winter, sro the change is similar in this 
respect at the two points. In November, December and January, at 
San- eine the thermometer falls from two to three and a a de- 
grees between 11 P.M. and sunrise e same is true precisely of 
Philadelphia. But while at Philadelphia in all the other months the 
fall during the same period of the night is twice as great, it is less than 
half as much atthe former place. In other words, the temperature 
falls in the night afier 11 p,m. four times as much at Philadelphia, as 
in the night. The early morning is sometimes clear, sometimes cloudy, 
and always calm. A few hours after sunrise the clouds break away, 
and the sun shines forth cheerfully and. delightfully... Towards noon, 
or most frequently about one o'clock, the sea breeze sets in, and the 
weather is completely changed. From.60 to 65 the mercury drops 
forthwith to near 50, long before sunset, and remains almost motionless 
till next morning. This is the order of things in three days out of 
four in June, July and August. May and September exhibit a degree 
of the same character, the sea winds establishing themselves in the 
former and declining in the latter month, ‘This subject will be more © 
fully investigated under the head of win 
The-remarkable uniformity of temperature at San Francisco, may be 
further illustrated by taking note of the number of days in the year 
which give the same degree. The most frequent temperature at sun- 
mate there. i find the rte rg on temperatuses at sunrise were 52 
and 68, but that the mercury stood at each of these points on fourteen 
San Francisco, in the year 1851, there were one hundred and 
sixty-one mornings with the temperature from 50 to 54 inclusive. At 
Philadelphia the greatest number of mornings within the like range of 
the thermometer, in the year 1839, was but forty-six. me the ros | 
place there were two hundred and nineteen days within nge 
degrees at noon, while the greatest number within that ia at Philae 
delphia was but sixty. 
It is not uncommon for the ‘canaonion at noon to stand almost at 
the same point day after day, for one or two weeks. , April, 
and Ociober, were the most irregular months in this respect, being in- 
terspersed aes a great proportion of warm days. But no other month 
of the year elapsed without exhibiting one or two casltaplinvondy 
when. the jee varied only five degrees. From the 12th to the 
26th of February (15 days), the lowest mark at noon-day was 55, and 
the highest 60. From the 2d to the 16th of June (15 res the low- 
Ps was 65, and the ata 70. From the Ist to the 13th of July (13 
), the lowest was 61; and the highest 65; and from the 17th to 
oe 27th of the same per the lowest wrenS: mee ol Bebe hes 68 
