( 27 ) 
Readings on June 28 1900. 
Thermometer |} t, te t; t, ts ts t; ts | 
Erie 
Reading. || 18° Tier Aden ELO | LFS 75) 179,8. | 1724 [142 A5 
{HH 170,61 
Corrected. || 17°.87| 179.77] 17°. kil 17°.6 id 172.7 ln 17e, Lan 
time 4,26 | 
| 
ae ae | | 
fais Lies) TEEN PVs Vee |. VI |: VIT 
top left to || 3.62 | 4.70 | 0.77 | 0.68 | 3.50 | 4.97 | 6.14 5,1B = 93.68 
gen | | | | 
Manometer | | 
EE | van | IX. | x | WE KIL | XU. XIV | 
en te | 4.38 | 5.66 | 5.58 | 6.81 | 7.27 | 6.84 | 5.83 | [nea 
time | 4.36 | 
| ae | | | 
Manometer 
Sesh: vu. | mx: | xe | We RS ME, IV: | 
bottom right = 
art 5.87 | 8.44 | 9.73 | 9.75 | 9.25 | 8.14 pe i lei 
| 
Manometer | | | | | | 
ae FAs The | III. | EV ae, | VI. VIL. | | 
pees | 7.18 | 7.49 | 4.32 | 4.59 | 9.97 | 4.83 | 3.80 | Nei 
| = 
time | 4,46 | 
Thermometer, t, ta ts t, t; te | ty ts 
d Tt = 170.63 
Reading. |/17°.9 |17°.8 |17°.8 | 179.65} 17°.7 |17°.8 |17°.7 | 1705 
Too == 17259 
Corrected. wen 17°.67 maa ar nat oF 17.7 | 179.62) 179.42 
| 
rech | i» |) 101, | w. |v. | vr | ve! SIL—2193,36 
303 .70|303.685|302.745|303.525 
Length. ||302. ee 304.195 
| = TL:=2123.61 
at the higher end, in the middle and at the lower end of tube By. 
Hence the mean temperature will be given pretty accurately for the 
first system by 1/g (t; + 2t + ts + 24 + 25) and for the second system 
by We (Qu + 2t; + te + 2t, + ts). The following table is obtained : 
