46 
MAGAZINE OF SCIENCE AND ART. 
METEOROLOGICAL REPORT. 
SnisET, Moxt.i or Juse, 1857. 
Prom observations talidn at 9 a.m. and 9 p.m. each day. 
Temperature op Air. 
Moisture. 
CLOUD; 
S0'254 
30191 
30180 
30082 
29- 983 
30- 027 
30 044 
29950 
29-975 
29909 
29- 934 
29 : 951 
30- 122 
30-180 
30-192 
30-037 
29-500 
29-428 
29-41® 
29:565 
29-682 
29-690 
29-579 
29-806 
29-9SQ 
30.073 
30002 
29-936 
29-901 
29-502 
29-908 51-0 
'= O 
« a 
50- 0 
49- 8 
51- 4 
50- 3 
47-1 
49-7 
47-8 
45-4 
42- 6 
39-8 
371 
38.0 
39-4 
43- 5 
41-8 
500 
555 
460 
43- 2 
41-3 
35-7 
41-4 
47‘J 
44- 6 
49’6 
40- 3 
41- 3 
410 
38-8 
38-8 
62-1 43-9 18-2 4 40 5‘39 
66-2 
36-3 
Winds. 
s 
§ 
53 § 
on 
o 
S-s 
a S 
Weather, etc. 
Ci. Cu. 
Cu. Ci-St. 
Ni. Ci-St 
Ci-St. 
Ci. Cu. 
Cu.-St. 
Ni. Cu. 
Ci. Cu. Ci. 
Ci.Cu.Ci.St 
St. Ci. 
Cu. 
Ci.-Cu. 
Cu-St. Cu. 
Ci-St. 
Ci.-St. 
Calm weather 
Confused clouds 
Showers. 
Night mists 
Peculiar clouds 
Shower 
Cloud-bank to E 
Lunar lidlo 
Fine cold weathei 
Continual distam 
storm clouds, and 
lightning to East¬ 
ward 
Change of wind 
Very threatening 
Heavy storm 
| Fresh breezes and 
> gales.' Dark con- 
j fused clouds. 
I Verv clear air 
1 light breezes 
J Distant lightning 
Large clouds 
Fine and dry 
Very clear 
) Clear, p 
f weather 
Gale 
Means and suins: 
Lllh.HtUE I c . L , c 
Lowest j at 9 a,m: or Up-.m: 
N B.—The observations are not corrected for diurnal 
variation. The principal instruments have been com¬ 
pared at Greenwich, and the readings are all reduced 
accordingly. 
Pressure ,—The barometer is 11 feet above tHe.s e a.-l e vel . 
The greatest range of .pressure is ;860 inch ine 
mean gaseous pressure of dry air is 29-620 inches. 
Temperature of Air .-The mean of all self-registered 
maxima and minima is 53 0 degrees. 
The adopted mean temperature of the month trom 
all observations is, therefore, 52 0 degrees Fahren¬ 
heit. The adopted mean of June, 1850, was 4S;4 deg. 
Moisture .—The dew-point is calculated from readings of 
Negretti'sand Lsmbra’s dry andwet bulb thermome¬ 
ters, bythe uso of Glaisher’s tables. 2nd ltdn. 
The mean temperature of evaporation at 9 a.m. and 
9 p.m., is 47-5 degrees. The mean elastic force of 
vapour is -288 inches. The average proportional 
humidity of the air is denoted by -77. -perfectly- dry 
air being taken as 0, and saturated damp air as iO. 
Rain .—More or less rain fell on 124days during the 
month. The total depth being is 5-39 inches; it 
is collected at one -foot' above the-ground and mea¬ 
sured at 9 p.m. 
Cloud —The extent of cloud is expressed by the tenths 
the -whole sky covered by it. , 
The forms of clouds are denoted as follows-, he 
her of days on which each kind occurred tenH 
the month being added in figures. 
Cu. Cumulus...9 Ci-Cu. Qirro-cumulUl-.... | 
r; firms 4 Ci.-St. Cmo-stratus mml* 
St Strams::::..2 On-Si 
Ni. Nimbus,...4. i 
Ozone.—The mean monthly amount of ozone is•- V 
6-6 degrees, by night 6-2 ditto. 
Winds .—The winds may he thus summed up.^ 
47 Nlf 1 day 
■w 
Bf 
S 
71 
3 
8 
41 
SSE 
S E 
dav 
E 
NE 
N 
i 
Double Bay, near Sydney, N.S.W. 
Calm 1 -> 
V. S. JEYONS. 
