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METEOROLOGY FOR FEBRUARY, 1870. 



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Leafing, Flowering, and Fruiting of a fexo Standard Plants in the Royal Society's 

 Gardens during the month. 

 1st — Kerry pippin apple commencing to ripen. 

 2nd — Windsor pear ditto ditto. 

 4th — Bon Chretien pear ditto ditto. 

 6th— Greengage plum ditto ditto. 

 15th — Common ash commencing to shed seed. 

 18th — Common Sycamore ditto ditto. 



Barometer mean, 29 928 in., being 0-097 in. above the average. 



Temperature mean, 63 45°, being 1-57° above the ditto. 



Solar intensity mean, 107-36°, being 51° belo-n: the ditto. 



De-w point mean, 48-2°, being 2 35° below the ditto. 



Humidity of air mean, -62, being •OS per cent, belo-w the ditto. 



Elastic force of vapour mean, •355, being ^019 per cent, below the ditto. 



Total amoimt of rain, 0-35in., being l-34in. above the ditto. 



Increase of spontaneous evaporation on rain faU, 4-97in. 



Mean amount of ozone, 6 37, being 64 of chromatic scale below ditto. 



Electricity active on the 4th, 8th, 11th, 12th, 13th, 14th, 16th, 17th, 18th, 20th, 2l9t, 

 23rd, 25th, and 2Sth. 



Strong Aurora Australis with frequent erratic meteors on the 1st. Wind strong from 

 N.W. and S.E. during the month. FRANCIS ABBOTT. 



