16 
NOTEWORTHY PHENOMENA OF 1903. 
Greatest atmospheric pressure ....00.+.++. 30°650 in., 14th January 
Least ” ” eoceceeecess 20°O46 in., 2nd March 
Hottest day in shade .....eceseeceeseee+s 82°1 degrs., 10th July 
Coldest night inshade ............+0..+. 20°0 degrs., 12th January 
Greatest range of temperature in 24 hours ., 31°6 degrs., 21st June 
Least 3 3 3 .. 2°4 degrs., 20th December 
Hottest day in sun wssssesevevececesevess 1241 degrs., 30th June 
Coldest night on ground.............++++. 13°2 degrs., 2nd December 
Greatest excess of open air temperature over shade temperature, 53-9 
degrs., 4th August 
Greatest difference between lowest temperature in shade and on ground, 
14°4 degrs., 11th June 
Greatest rainfall on any one day, 1-810 inches, 27th October 
Latest early Summer frost, 0°3 degrs., 12th May 
Earliest Autumn frost, 2:0 degrs., 6th November 
Severe gales, 6th July, 6th October 
No snow fell in 1903 
Thunderstorms in May, Ist, 2nd, and sth 
Greatest number of consecutive days on which rain fell: 12, 28th February 
to 11th March; 11, Ist to 11th May; 12, 9th to zoth August; 13, 
ist to 13th September; from Ist to 27th October, except the 4th 
Greatest number of consecutive days on which no rain fell: 8, in April, 
8 twice in June, September, and December; 9, in May 
Sunniest day of the year, 11°75 hours on 8th April, being 90-4 per cent. 
of the greatest possible amount 
More bright sunshine in the afternoons, averaging nearly half-an-hour on 
each day of bright sunshine 
Welsh hills at 9 a m.—These were only visible on 122 days, a little more 
than one-third of the year ; 82 days clearly, and 40 very clearly seen 
EXPLANATIONS. 
Local Mean Time is used for the regular observations. 
The Barometer readings, taken at 9-0 a.m. and 9-0 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 a.m. and placed to previous day. 
Ground Temperatures read twice daily at 9-oa.m. andgp.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 9-0 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 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-o an overcast day. 
The Wind direction is taken by means of a Compass Nephoseope, 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. 
