of the 'temperature of boiling Water. 367 
there being only 1 5 0 or 20° of the i’cale, equal about 
•— part riling out of the water expofed to the tempera- 
ture of the fleam, v> 1m c h in one or two experiments was 
found to be 180 0 or 190°, fo'thatj the correftion for this 
defeat of heat would only amount to a very few hun- 
dredths of a degree, perhaps about ,04 or 05, which, as 
the inftrument was expofed to the fame circumftances as 
near as might be in all the obfervations, I have taken no 
notice of. I thought it neceflary to fay thus much re- 
fpecting the precifion of the inftrument and the appara- 
tus, and lhall now relate the obfervations at length. 
' i . ) » 
Table of the obfervations. 
0 
Place of obfervation. 
Height of 
the baro- 
meter. 
| - Therm, at. 
Barome- 
ter reduc- 
ed to the 
heat of 
5 °°* 
Boiling 
point. 
Mean 
boiling 
point. 
1 
[Summit of Snowdon in Car- j 
narvonfhire, Aug. 15, 1778^ J 
1 
Inch. 
26,487 
0 . 
46 
Inch. 
26,498 
0 40ths. 
207, 8 1 
206,38 j 
\ 
0 iooths 
207,07 
2 
| 
1 
1 
I 
! 
Top of Carn Cwm 'Gaff, \ 
Aug. 16,1778, i\ 
■ ■ - * L 1 j 
1 . ; - j 
27,274 
i 
62 
27,241 
268.27 " 
208,24 
208.28 
208jI9 
208,29 - 
208,64 
•o 
0 
Tn the defeent from ditto. 
27,957 
■ 
S 1 : 
2 7?954 
209,281-, 
209,37 j 
2 0 9.39 1 
*209,32 ( 
209,32 1 
209.40 J 
209,87 
Ccc J 
Table 
