232 EEV. C. W. HAEVET — FROST OF JANTTAEY, 1881. 



temp, lowest in S. ; day temp, in N. Minima ranged from 28"" 7 

 at liotliamsted to ll°-8 at Wansford House, Watford; the mean 

 being 20°-7, the highest in the period. Maxima ranged from 39° 

 at Oaklands, Watford, and 38° at Bayfordbury, to 30°-7 at 

 Throcking ; the mean being 34'''2, also the highest in the period. 



Monday, 24th. — Temperature again declined. Mean 23°'4. 

 Night temperature much lowest in N. ; day temp, much lowest in 

 S. Minima ranged from 22° at Southgate and Bayfordbury to 

 11 "■2 at Throcking, and 5° at Gorhambury, this latter being 

 relatively very low; the' mean was 18°' 8. Maxima ranged from 

 36°-2 at Koyston to 24° at Nash Mills (Hemel Hempsted), 

 Knebworth, and Oaklands, Watford; the mean being 28°"0. 



Tuesday, 25th. — Mean temp. 22°"6. Night and day temp, 

 loAvest in N. Minima ranged from 21° at Bayfordbury and 

 Knebworth to 11°"7 at Throcking; the mean being 19°. Maxima 

 ranged from 28°'5 at Moor Park, Eickmansworth, to 23°'7 at 

 Throcking ; the mean being 26°"2. 



Wednesday, 26th. — During the day the frost began to break 

 up. Mean temp. 23°"7. Night and day temp, both lowest in N. 

 Minima ranged from 17° at Berkhampstead to 11°'5 at Throcking, 

 the mean being 14°'5. Maxima ranged from 37° at Berkhampstead, 

 and 36° at Knebworth to 28° at Royston, and Oaklands, Watford ; 

 the mean being 33°'0. 



At the commencement of this period the barometer was some- 

 what below its mean height for the month, there was however a 

 tendency to rise; by the 14th it had attained its mean height, 

 which it maintained with little variation until the 17th, when a 

 rapid depression of the mercury occurred ; during the 19th and 20th 

 a very rapid rise took place, pressure being high until the 24th, 

 when a frosh depression appeared. The wind, with the exception 

 of the gale of the 17th and 18th, was slight in force, having a 

 northerly tendency. The weather was on the whole bright, no 

 snow of any consequence falling except on 18th and 19th. At 

 about 3 p.m. on 17th a very distinct halo round the sun was observed. 



Such is a recoixl of the frost of January, 1881, a frost which will 

 I fancy long live in our memories as affording us some sliglit idea 

 of what the intense cold of the far North must be. 



