RESEARCHES IN THERMOMETRY. 575 
TABLE II, 
fi y Found. y Cale. 
0 = —— 
‘60 344 ‘374 
1:24 ‘297 "297 
1:32 ‘284 ‘288 
2°93 "202 "198 
3°99 172 159 
5:21 103 120 
7°63 073 073 
9:60 043 052 
Probable error of a single com- 
parison, ; 2 : 010 
In this, as in all cases to be hereafter referred to, the calculated number is 
taken from a graphic curve accurately representing the equation. 
The following results refer to three thermometers, V, V,, DM, observed by 
DespRETZ.* The instruments were constructed in the year 1832; when the 
experiments commenced they were full of air. 
The equations are 
Wy = '300('8941)* + 200(-060)", 
Iv, ='319(-8945) * + 161(-081)", 
You = '242('8670)* + °358(-042)". 
The unit of x is 100 days. 
TABLE III. 
a V Found. | V Calc. is V, Found.| V, Cale. | tn, DM Found.) DM Cale. 
0:00 0:50 — ‘48 — 0 600 — 
0°70 ‘30 300 30 313 1:49 190 198 
0:95 28 297 28 "293 51d 140 E16 
1:28 ‘28 266 ea ‘28 278 || 6:23 120 ‘099 
2:20 21 | 238 S ‘26 ‘260 8:89 080 067 
5°86 13 "155 as oS) “167 10:57 000 053 
5-98 15 | 153 || = ay 164. 
9°60 13 150 3S 13 ‘110 
11:28 08 ‘087 rs) 09 091 
A155 ‘08 086 4 ‘06 088 | 
14:83 08 061 > ‘06 059 || 
18:20 04 039 2 03 042 | 
18°24 03 039 3 03 042 
18°36 ‘04 ‘039 ) 03 ‘O41 
19°39 06 033 a 03 036 
19°58 ‘08 033 77 ‘06 035 
Probable error of a 
single comparison,! ‘014 ae cr SOLON iy ce: one 021 
* Ann. Ch. Phys. lxiv. 316, 317. 
VOL. XXIX. PART II. 7F 
