vd 
a 
a 
323 
eed register the variation of the extremes, as under. I have en- 
tered the pressures here in English inches, since they have al- 
ready been reduced for the Comparative ‘Table ; but to save un- 
necessary calculations, I retain the temperatures in Centigrade 
degrees, 
Pressures em peratures. Diff. in 
3 Mepeinecat in inches. - Maximum. Minimum deg. Centi. 
ae 64in'14 7, 122°-97C4 “09°73 
Se 85. -70 1333 32 -64 “66 
a, 136 -85 149 -7 149 -54 0 -16 
8 194 -42 163 -4 163 -00 0 -40 
9 220 -69 168 -5 168 -40 0 -10 
| 15 348 -04 188 -5 188 -30 ) -20 
2] 514. -22 206 :8 206 -40 40 
Wi 516 -84 207 +4 207 -09 0 -31 
ple .25, 553-69 2105 210 -47 03 
zi 644 -96 218-4 218 -30 ) 10 
a wy 716 13° 224 -15 88 ) 27 
id ey Mean difference, .  0%3055 C.=0°-55 Fah., 
gepiiratent to a mean = of + 0°-28 Fah., arising from the un- 
Sa of tempera 
ntrast this with the formula we have from the same ex- 
‘periments as under 
i aeep pers ures. 
INo. of sonnet lac Observed. By the formula. |Differences. 
es PRL 23°-7° CH 123°:9 C. 
133 °3 133 «8. 
149 -7 150-8 
163-4 164-5 
168 +5 169-5 
188 5 189 
206 -8 206 -8 
207 4 207 +2 
210 5 210 -4 
218 -4 = 217 7 
224-15 222 °:9 
Mean difference, 
Bee tios between the formula and the bie but Little 
more than the admitted error of the thermometric re 4k 
“Mean.error of observation from this last source, was hae just. 
