XXV. 
METEOROLOGICAL OBSERVATIONS TAKEN AT THROCKING, 
HERTS, DURING THE YEAR 1886. 
By tlie Bey. C. W . Harvey, M.A., F.B.Met.Soc. 
Read at Hoddesdon , 3rd November, 1887. 
Station. — Position , Lat. 51° 57' NT., Long. 0° 3' W. Height ,;484 
feet above sea-level. The position of the instruments, and time 
of observing, are precisely the same as in 1885. 
The following table shows how far Pressure, Temperature, and 
Bainfall in 1886 differed from the mean for the whole period 
during which observations have been made, viz. the seven years 
1880-86. 
Months. 
Pressure. 
Temperature. 
Rainfall. 
Mean 
1880-86. 
Diff. 
1886. 
Mean 
1880-86. 
Diff. 
1886. 
Mean 
1880-86. 
Diff. 
1886. 
January ......... 
30*03 
— 0*41 
35*3 
— i*6 
i*43 
4" 1 *06 
February .......... 
29*90 
4-0*21 
38*8 
—7*o 
2*26 
—2*02 
March .............. 
29*99 
4-0*05 
40*9 
—27 
1*01 
4-0*64 
April .. 
29*89 
4-0*05 
45*2 
—o*4 
1-83 
—0*50 
May .. 
29*99 
—0*08 
50*6 
—0*6 
I ' I 7 
+3-46 
June .................... 
29*95 
—0*01 
56*5 
—o-8 
1*96 
—1-55 
July ... 
29*96 
■- 
60 *7 
4-0*2 
2*74 
—0*37 
August ............... 
29*99 
—0*02 
59*6 
4-1*2 
210 
—0*76 
September . 
29*94 
4-o*ii 
56*0 
4-1*4 
2*71 
—1*53 
October... 
29*89 
—0*13 
47‘3 
4-3*0 
3‘4S 
—o*35 
November.......... 
29-93 
—0*13 
42*0 
4-0*4 
2*60 
4-o*6i 
December.......... 
29*90 
: —0*25 
37*7 
- 2*8 
2*26 
4-1*03 
Year.......... 
29*94 
—0*06 
47‘S 
—o*7 
25*52 
—0*28 
Prom this table it appears that on the whole 1886 was a very 
average year. February was very cold but very dry. May was 
very wet, whilst October was more than usually warm. 
Pressure. •— The most important depressions were those of 
October 16th and December 9th; on the former date the mercury 
stood at 28'65 ins., on the latter it was' as low as 28*36 ins. ; this 
is the minimum point reached in the period covered by my 
observations, and makes the range for 1880-86, 2*58 ins.; i.e. 
from 30*94 ins. on Jan. 18th, 1882, to 28*36 ins. on Dec. 9th, 
1886. 
Temperature.— 1 The total range of temperature for the year was 
69°*3, i.e. between 15°*6 on Jan. 8th, and 84°*9 on August 31st. 
This is a greater range than in any previous year since 1881, The 
deficiency in the temperature was rather more observable in the 
day than in the night temperatures, the one being 0°*9, the other 
only 0°*7 below the mean. The highest maxima and lowest 
minima were: 
YOL. IV.—PART YU. 
14 
