16 
were each fully one degree below the average temperature, and as there were 
12 days frost on ground in April, and 5 sunless days in May, and a prevalence 
of cold easterly winds, it is not surprising to learn that it is one of the most 
backward Springs on record, so far as vegetation is concerned, and an exceed- 
ingly trying one for invalids and old people. 
NOTEWORTHY PHENOMENA OF 1899, 
Greatest atmospheric pressure ............ 30°758, 26th January 
Least ” ” seecsecesece 28°380, 26th December 
fottest day in tshade!(,\oc\eeie siste/v t's 5, o's'0 2) 0's 85:8 degs., 24th August 
Coldest night in shade ........... sseeeee 12°6 degs., 14th December 
Greatest range of temperature in 24 hours .. 36°6 degs., 16th March 
Least 7s 7 5 a .. 2°5 degs., 27th October 
Hottest day in sun ..........000-eeeeee 01246 degs., 6th July 
Coldest night on ground....... seveceeeeee 6°7 degs., 14th December 
Greatest excess of open air temperature over shade temperature, 52°4 degs., 
19th June. 
Greatest difference between Jowest temperature in shade and on ground, 
19°5 degs., 28th May. 
Greatest rainfall on any one day, 0780 in., Ist and 29th October. 
Greatest number of consecutive days on which rain fell 18—13th to 
30th September. 
Greatest number of consecutive days on which no rain fell 17—1Ist to 
17th June. 
Sunniest day of the year, 113 hours, 18th August, being 90 per cent. of 
the total possible. 
Welsh Hills at 9 a.m,—These were only visible on 115 days, or barely 
one-third of the year. There were only 14 days in the months of 
January, February, March, and December, on which they could be 
seen, and on only one day in March, 
EXPLANATIONS. 
The Barometer readings, taken at 9-0 a.m. and g-0 p.m,, are corrected 
and reduced to sea-level and 32:0° Far. 
The Approximate Mean Temperature is the mean of the maximum and 
minimum read at 9-0 a.m., and found by multiplying their difference by the 
Meteorological Office co-efficient, and adding the product to the minimum. 
Temperature in Sun read at 9-0 a.m. and placed to previous day. 
Ground Temperatures read twice daily at 9-o am. andg-op.m. The 
lowest reading for the 24 hours, prior to 9-0 a m., is entered to the previous day. 
Underground Temperatures taken daily at 9-o a.m. The air tempera- 
ture is given for purposes of comparison. 
The Relative Humidity is calculated by dividing the mean elastic force 
of Aqueous Vapour, at the temperature of the Dew Point (as determined by 
Glaisher’s Factors), by that corresponding to the temperature of the air (z.e. 
the Dry-bulb reading), 
The Rain is measured at 9-0 a.m., and the amount entered to the 
previous day. A fall of 0-006 inch and above constitutes a day of rain. 
‘When any snow falls, the day is counted as a day of snow. 
When the mean of the 9-0 a.m. and 9-0 p.m. observations of the 
amount of cloud is less than 2:0, it is called a day of clear sky; if the mean 
is above 8:0 an overcast day. 
The wind direction is taken by means of a Compass Nephoscope, from 
the drift of the lower clouds. 
When the Force of the Wind is 7 and above (on Beaufort’s Scale o—12), 
it is accounted a Gale. 
Ozone read at 9-0 a.m. (according to Dr. Moffat’s Scale o—12), and 
placed to previous day. 
Sunshine Record.—The photographic traces are fixed before being 
measured. 
Fog, &c.—The fog, haze, &c., are made from the visibility of objects 
and lights at definite distances from Rutland Cottage. 
Local Mean Time is used for the regular observations. 
