METEOROLOGY FOR JANUARY, 1870. 



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

 Gardens during the month. 

 1st. — First apricot (royal) gathered. 

 8th.— Gre-vdlea robusta in full flower. 

 9th. — Jargonelle pear ripe. 

 12th. — Mulberries commencing to ripen. 

 14th. — Veronica angustifoUa in fuU flo-wer. 



Barometer mean, 29 758 in., being 031 in. above the average. 



Temperature mean, 62 62', being 0-2-2° below the ditto. 



Solar intensity mean, 107 60°, being 2-04' below the ditto. 



Dew point mean, 49-0°, being 1-55' below the ditto. 



Humidity of air mean, 64, being 03 per cent, below the ditto. 



Elastic force of vapour mean, 361, being 012 per cent, below the ditte. 



Total amount of rain, 4-57in., being 3-21in. above the ditto. 



Increase of spontaneous evaporation on rain faU, 0-23in. 



Mean amount of ozone, 5 85, being 102 of chromatic scale below ditto. 



Electricity active on the 1st, 4th, 5th, 6th, 7th, 8th, 9th, 10th, 11th, 14th, I7th, 19th, 

 20th, 21st, and 29th. 



Hot wind on the 3rd, followed by thunder, lightning, and rain. Hot wind on the 

 18th. FRANCIS ABBOTT. 



