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143
METEOROLOGY.
The mean temperature of the air in Greenwich, in 1887
was 47°.8 Fahrenheit, 0'8 below the average of 115 years and
1.4 below the average of 45 years: the means in the four
quarters respectively were, 37.3, 51.6, 61.0, and 41.3. The
highest reading by day (92.2) was registered in the week ended
July 9th, and the lowest reading by night (15.5) in the week
ended January 8th. The means of the highest weekly readings
by day, in the four quarters respectively, were 53.5, 79.4, 84.2,
and 57.8; and of the lowest readings by night, 24.7, 32.8,
40.9, and 28.0. The hottest week was that which ended July
9th (mean temperature, 69.3), and the coldest week that which
ended March 19th (mean temperature, 31.4). July was the
hottest month, (mean temperature, 66.5): and January the
coldest (mean temperature 35.0). August exhibited the greatest
range in temperature, viz., 48.5:—from 89.5 to 41.0; and
December the smallest range, viz,, 30.1:—from 54.l to 24.0.
The dryness of the atmosphere, i.e., the difference between the
dew-point temperature and air temperature, was 6.7, or 2.5
below the average of 45 years. Rain fell on 141 days, the
total amount registered in the year being 19.86 inches, 5.36
less than the averages of 72 years. Most rain fell in November
(3.78 inches), and least in February (0.53). The means of the
readings of the barometer were 29.840 inches; the means of
February 30.145, and of November, 29.530, being respectively
highest and lowest. The relative proportion of wind was:
north, 100; east, 74; south, 83; and west, 108.
VACCINATION.
Table X. (Appendix) is a return respecting vaccination in
1886, compiled by Mr. Shattock, the Vaccination Officer, whose
energetic discharge of the duties of his appointment it is always
a pleasing duty to recognise. The return shows a loss of 5.4
per cent. in the cases, against 4.0, 3.9, and 4.6 in the three
preceding years, "from removal of childrea to places out of
parish unknown, or which cannot be reached, and cases not