304 
Date and Hour. 

1849. Dec. 15, 
1117 a.M., 
I 43 J. 
12 13 P.M., 
12/39... 
Pal Oe os 
ab oes 
Sie 3 
224 ... 
248 ... 
Salo ox. 
1849. Dec. 17, 
10 44 a.m, 
Wisd 3. 
11 58 
12 29 P.m., 
1248 ... 
ga Misra 
a Ut: Deer 
255 6. 
216 ... 
2 38 
rns 
1850. Feb. 1, 
11 40 a.m., 
125 P.M, 
329 ... 
347 ... 
1850. Feb. 19, 
10 50 a.., 
LE ay 
11 43 
12 12 p.m. 
1244 ,., 
20 ee 
145 ... 
LL Weve 
PER ARS 
ON Pa 
330 ... 
353... 
1850. Mar. 14, 
10 38 a.M., 
OSD: <.. 
hs ey a 
1144... 
123 P.M, 
W216)... 
1236)... 
1850. Aug. 14, 
10 19 a.M., 
1028 ... 
1052 ... 
PTD 5. 
EES? .. 
MUBS) 6. 
12 25 P.M, 
1247 ... 
PIS) ..6 

MR J. DALMAHOY ON THE WEIGHT OF AQUEOUS VAPOUR 










4 x | 8 & 
5 @:/2 |3 
2/3 22 | 32 | 2 
2 | eS Se | eg | 34 
* |Ae eof | a8 of 
o | sF& a BA ° Bo 
2/2) § | ga | eb | 26 
als S fe) 22/8 
pa Ss i=] ts) ar ms 
$\8 Pesala Se 
z2/a = ie te = 
tee Wace EPEC peaes dee lt zee 
1/ 5] ... | 51-0| 47-9] 44-7 
2| 5] ... | 51:5] 47-9) 44-2 
3) 5] 2. | 51-5] 48-2) 448 
4| 6] ... | 61-4] 48-1] 44-7 
5| 6] ... | 51:5] 48:2] 448 
6| 5] ... | 51-4| 48:3] 45-2 
7| 5] ... | 61:5] 48-3} 45-1 
8| 5] ... | 51-4] 481] 44-7 
9] 5] ... | 51-4] 48-3] 45-2 
10} 5] ... | 51-4] 48:3] 45-2 
Sy [eS DOTS RI NINES ATT, 
11] 10] ... | 52:4] 49:5] 46-7 
2) 5 52-4] 49:5| 46-7 
13| 5] ... | 528] 49:9) 47-2 
14] 5] ... | 585] 50-1) 469 
15] 5] ... | 531] 50-1] 47-3 
16] 5] ... | 53:0] 50-0] 47-2 
TAO 52:9] 50-1) 47-5 
Li ans 52:9| 50-1] 47-5 
19| 5 52-7 | 49-:9| 47-2 
20| 5] ... | 52:5] 49-7) 47-1 
}21} 5] ... | 52:6] 49-7] 46-9 
Sed lies OSTOE| cece illus ek eee 
221 5] .... | 60:1] 47-4] 44-6 
231 5] ... | 50-0] 47-4| 44-8 
oa] 5 500] 47-6| 45:1 
25 | 5 50-2] 47-5) 44-7 
26] 5 50-4] 47-4| 44-4 
97) 3 50'1| 47-4] 44-6 
28] 5 49:9| 47-4| 44-9 
29] 5 49-9] 47-5] 45-0 
30| 5 50:0} 47-4| 44-8 
STs eb, 50:0| 47-4| 44-8 
32] 5 50:2| 47-6] 44-9 
83| 5] ... | 50-2] 47-6| 44-9 
Seales 20-27 Cle meal) Peel ee 
34] 5] ... | 54:3] 50-2] 463 
35 | 5] ... | 54:3] 60:2] 46:3 
36] 5 54:5] 50°5| 46-7 
87 | 5 54:6] 50-7| 47-2 
as | 5 54:5| 50-4| 46-5 
39] 5] ... | 546] 50°6| 46:8 
40] 5] ... | 54:6] 50-6] 46:8 
41] 5] ... | 55:1] 508] 46-7 
42| 6] ... | 54:8] 50:8] 47-2 
43] 5] ... | 64:7] 50°6| 46-7 
44| 5] ... | 546) 50:6] 46-8 
45| 5] ... | 545] 506] 46:9 
fe. | ear KD: B8 5) een ees |) eee 
46| 5| ... | 566| 51-1] 45:8 
47| 5] ... | 567| 51-2] 45-9 
48 | 5 568] 51:3] 46-0 
49| 5] ... | 568] 51:3] 46-0 
50| 5| ... | 56-8] 51:3] 46-0 
51| 5| ... | 568] 515] 465 
PS CREY HIE | cael) Be 
52| 5] ... | 67:3! 60-4] 55:6 
53] 5 67-4| 60:5] 55-7 
54] 5 67°5| 60-6] 55:8 
55| 65 67:7| 60-7 | 55'8 
56 | 5 67-8| 60-8 | 56-0 
57 | 5 67-9] 60-9| 56-1 
58| 5 68:1| 61-0! 56-2 
59] 5 68:3| 61:3 | 56-4 
60} 5] ... | 68-6] 61-6] 56-8 
61] 5 68:7 | 61-7) 57-1 
62/ 5] ... | 68-8] 618] 57-2 
63| 5] ... | 69-0] 61-9] 57-2 

Tension of vapour at the 
dew-point. 

“B12 
306 
313 
312 
313 
“316 
“316 
"312 
316 
“316 
“334 
834 
338 
336 
340 
339 
“343, 
343 
339 
338 
336 
311 
312 
sion of yaponr at the dew- 
point and 32°. 
Difference between the tem- 
Difference between the ten- 

112 
“106 
113 
"112 
113 
116 
116 
112 
116 
116 
134 
"134 
138 
“136 
140 


TABLE I. 
perature of the air and of 
sel when dry. 
the condensing surface. 
Weight of the copper ves- 


Grains. 
803-90t 
80389 
80389 
.. | 808-88 
w. |803:87 
803-87 
80386 
80385 
803'85 
80384} 
803°78t 
803-77 
803:76 
803°76 
803°75 
v. | 803-74 
803-73 
».. | 803-72 
... | 803'72 
.. |803-71 
... | 80370 
803°70t 
803:69 
803-69 
803-68 
803-67 
803-67 
803-66 
803°65 
803°65 
803-64 
+ | 803-64 
ee | 803°63F 
803-63 
803-62 
803°62 
803°61 
803°61 
803-60 
803-60 
80359 
803:°59 
803°58 
803°57 
80357 
803°56t 
803'55 
80354 
80353 
80352 
. 80351 
«| 80349 
80348 
79240 
792°39 
79238 
792°37 


792°36 
792-35 
792°34 
79233 
79238 
792°32 
792°31 
we | 792-8 
-»» | 79230 
792°30t 


Difference between the weight of the 
copper vessel before and after the 
condensation of moisture. 












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EI Be jays | 2 5 Bo 
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4 Bs OV eee™ eran 
a . 17°40. 
















REMARKS. 
The greatness of the re 
experiment 34 was prd 
owing to an imperet 
current. 
The experiment spoiled. 
The condensing vessel 1 
The experiment spoiled, 
It is evident that in th 
experiment some e 
water must have falls 
condensing surface. 




