MADE- HOURLY AT LEITH. 
185 
temperature of the whole observations, as derived by the 
last mentioned plan, for the general standard of comparison. 
It was, . . . 48.73-f- 
Mean of t?ie maximum and minimum averages, 49.69-f- 
1 a. m. and 
2 a. m. — 
3 a. m. — 
4 a. m. — 
5 a. m. — 
6 a. m. — 
7 a. m. — 
8 a. m. — 
9 a. m. — 
1 p. m„ 
2 p. m., 
3 p. m,, 
4 p. m., 
5 p. m., 
6 p. m., 
7 p. m., 
8 p. m., 
9 p. m., 
— - — — 10 a. m. — 10 p. m., 
— — — 11 a. m. — 11 p. m., 
— - ~ — 12 noon — 12 midnight, 
— — — 7 a. m, 2 p. m. and 9 p. m 
— — — 8 a. m. 1 p. m. — 6 p. ra, 
— — •— 7 a. m. 1 p. m. — - 10 p. m 
49,12 
49,12 
49.58 
49.83+ 
48.74+ 
48.31 
48.16+ 
48.16+ 
48,06+ 
48,53+ 
48.60 
48.63 
*, 48.90+ 
t, 50.79+ 
±, 48,68+ 
— — 5 a. m. 10 a. m, 3 p. m. and 10 p. m., 48.74-j- 
Here, then, are many hours which afford a near approxi- 
mation to the average temperature assumed as the standard 
of comparison ; and many others might be combined to give 
the same result ; but this were needless. 
From what has been already recorded, it appears, finally. 
Firsts That no single hour approaches, more nearly, in 
its temperature, to the true average temperature of the 
day, than does eight in the morning, or eight in the even- 
ing, (for, according to the preceding calculations, their 
temperatures seem to be exactly the same). The difference 
between the true mean of the day, and the temperature at 
ieight o'clock, was about ^-^^ of a degree. 
* Hours proposed by Dr Dewey, 
•j- Hours proposed by the Philosophical Society of New-York, 
$ Hours which I myself found to approach nearer, in their mean tem- 
; perature, than any other three hours, to the average temperature of the day. 
