Mr.  W.  Whitehouse  on  a  New  Hygrometer 
541 
Table. — Giving  comparison  of  Readings  of  Wet-  and  Acid-bulb 
Hygrometers. 
1871. 
Mason's 
Hygrometer. 
Mr.  White- 
house's. 
Deductions  from , 
Wet-bulb 
Hygrometer. 
Remarks. 
1 
| 
.  .0 
d  3     . 
\i 
Dav.      '     Hour.      Drv 
Wet  j  !L- 
Acid 
2  • 
<M       . 
•jj  T3  '■+= 
*          :                         Bulb.] 
3ulb. 
=1  ' 
Bulb. 
S  § 
.2  & 
MS  O 
1 
A 
a 
H 
£ 
K 
Acid  flowing    from 
bulb  1  drop   i 
a  33 
secon 
Is. 
i 
h    m            o        o 
0 
0 
0 
in. 
grs. 
Sov.  G   ..  io     7  a.m.  4cro  36*0   4'o 
6o'2 
20'2 
•172 
2'0 
69 
••10  30    „     40-5!  36-3!  4-2 
6r5 
2I"0 
•173 
2*0 
69 
,.        ••  11   25    »    ■4I'o  36-7|  4*3 
6r3 
20*3 
•'75 
2*0 
68 
f  At    noon    the    wet 
•  •ii   33    »      4i'o  37'o   4-o 
62*0 
21-0 
•l8o      2-1 
0    1 
70 
bulb  was  washed 
„       ..14  r.M.  43*0  38-0 
S'o 
64-0 
21-0 
•l8l       2#I 
65 
and        resupplied 
••     1    5°    M 
44-°j  38*5 
S'S 
65-2 
21*2 
•i8o|    2*1 
62 
[     with  water. 
••    2.    5   » 
44*0,  39*o 
S'° 
65-3 
21-3 
•188!      2-2 
65 
Sky  has  gradually  be- 
„      ••    *  ao   „ 
437  38-8 
4'9 
65-9 
22-2 
•l88!     2-2 
66 
come  overcast  since 
„       ..    a  30   „    |44-o'39'o    5-0 
657 
21-7 
•l88       2-2 
65 
the  morning. 
„       ••'  3  3o    »    i  44'Oj  39*3 
47 
66-3 
22-3 
•I93;      2'3 
67 
„       ••    3  55    »     44'o  39'6 
4*4 
67*0 
23-0 
•I98 
2'3 
68 
f  Note  the  change  in 
Nov.  7   ••    9  45  a.m.  45-0' 43«o 
1                  ' 
2'0 
75-0 
30-0 
•*53 
2-9 
85 
\  night !  Dark  and 
I     foggy  day. 
..10  10   „     45-5  44-0 
i*5 
77-8 
3^3 
•270 
31 
89 
(0 
„       . .  10  20   „     46-0  44-2 
i-8 
76-0 
30*0 
•269 
31 
87 
..  10  30    „    J46-o'(44'2 
r8 
76*2 
30-2 
•269 
3"i 
87 
•  •  11     5    i>    ! 
46-8  45-0    i'8 
75-2 
28*4 
•277 
3'i 
87 
(0 
„       ..  11 
477  45"6j  2#I 
78-0 
3°-3 
•276 
3"2 
87 
i>       •  • 
I    15  P.M. 
50-0.47-0    3-0 
82-0 
32-0 
•286 
3'3 
80 
Vapour  has  increased, 
3  15  »  : 
50-0  47-0    3-0 
82-4 
3**4 
•286 
3'3 
80 
but    humidity    has  ! 
>» 
3  5°   » 
50-047-0    3-0 
82-9 
32'9 
•286 
3'3 
80 
decreased. 
>i 
4    0    » 
5o-c  47-0 
3-0 
83-0 
33*° 
•286 
3*3 
80 
n 
5         °      N 
49  "5  46*5 
3*o 
83-5 
34° 
•281 
3-2 
80 
n 
6     0    „ 
49"5  46-5 
3"o 
82-5 
33'° 
•281 
3*2 
80 
»» 
8     0    „ 
510 
47-0 
4.0 
8i-5 
30-5 
•276 
3** 
74 
Nov.  8  '.'. 
»>       •  ■ 
9     0    » 
IO   40  A.M. 
495 
47'5 
46*0 
45'5 
3-5 
1    2-0 
:  795 
818 
30-0 
343 
•270 
'  -280 
3'o 
3'3 
76 
86 
f  Sky  overcast ;  slight 
\      misty  drizzle. 
10  50     „ 
11  15     » 
5°'3 
50-0 
48-0 
47-6 
z«3 
2-4 
89-0 
j  88-o 
387 
38-0 
•305 
i  -30c 
!    3-5 
j    3'4 
84 
83 
|  Vapour  increased ; 
\      humidity  deer. 
»»       ■  • 
II    25     » 
ffOOH 
50-0 
50-3 
47-c 
47*c 
3-0 
3*3 
*5'3 
82-0 
i  35*3 
3*7 
1 
'  -286 
-283 
i  t 
1    3'3 
|    3"3 
80 
78 
/  Sky    clearing    since 
1       11.25  A.M. 
f  Humidity  greatly  re- 
\      duced;  vapour  not 
» 
I    50  P.M 
Sve 
45*5 
5*5 
81*0 
30-0 
\Mt 
2-8 
63 
[     so  much. 
f  Vapour  decreased  in 
»i       •  • 
2-    30     „ 
49"7 
43-< 
67 
75-2 
25-5 
•21c 
2-4 
59 
<      greater  proportion 
>» 
3     0    „ 
49-0 
43-2 
5-8 
76-o 
2yo 
•22] 
2'5 
63 
[      than  humidity. 
"    " 
3  50    „ 
487 
43'c 
n 
I74'7 
260 
1 
|,„ 
:2'5 
!    66 
