Till. 



DECEMBER, 1873. 

 Private Observatory, Hob art Town. 



2? >>S 



o o b 



(U o a 



m O 22 



7i -^ o 



9 S S s 

 ^ o ~-^ 



-^ £ ^ OT 



9 <6 <- 

 '- tou 



^ s =* 



: o3 



H-S H o c3 



o 



03 fl 



11 



E-t bo 



Barometer mean, 29-745in., being 90-003in. below the average. 

 Temperature mean, 67 '24', being 6-05° above the average. 

 Solar intensity mean, 111-50°, being 6 68° above the ditto. 

 Dew point mean, 504°, being 113° below the average. 

 Humidity of air mean, -56, being -10 per cent, below ditto. 

 Elastic force of vapour mean, 372, being -019 per cent, above the ditto. 

 Total amount of rain, 1-llin., being 70in. below the ditto. 

 Increase of spontaneous evaporation on rainfall, 4 42in. 

 Mean amount of ozone, 5-4, being 2 7 of chromatic scale below ditto. 

 Electricity active aU through the month. 



Mean dailv amount of sunlight observed for anticipating a clear sky at the transit 

 of Venus, 1874 ;— 1872, December= 73 per cent. 1873, ditto= 77 ditto ditto. 



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



Gardens, during the month. 

 14th.— First bunch of Red Currants ripe. 

 17th.— Common Privet commencing to flower. 

 20th. — First bunch Black Currants ripe. 

 25th. — Melia Azederach commencing to flower. 

 26th. — Doyenne d'Ete Pear ripe. 

 Slft.-^uneating Apple commencing to ripen. FRANCIS ABBOTT. 



