466 METEOROLOGICAL REPORT, 1871, BY THE 



Wylam. — A very fine month ; very warm from 8th to 12th. 

 A good deal of thunder and lightning all over England, and 

 several deaths from lightning. 



Barometer— Mean height at 8 a.m., 29-923; highest, 30-431 

 on the 28th ; lowest, 29-168 on the 25th. 



Thermometer — Mean of maximum 71'90° 



Mean of minimum 49-81° 



Difference 22-09° 



Mean for month -(2^1+^-)= 60-85° 

 Mean for sixteen years 57*74° 



Excess of 1871 3-11° 



Highest reading, 84° on the 11th; lowest, 38° on the 22nd. 



Mean of wet bulb at 8 a.m., 54-22° ; of dry bulb, 57-81° ; dif- 

 ference, 3-59°. 



Fall — Rain, 0-87 inch ; greatest fall, 0-44 inch on the 21st ; 

 days of fall, eight. 



River Tyne at "Wylam Bridge — Mean height, 1-64 feet; high- 

 est, 3*7 feet on the 21st. 



Wind— W., 23° S. 



Solar Halos were seen at Sunderland on the 23rd, 27th, and 

 31st. Lunar Halos were seen at North Sunderland on the 27th ; 

 at Sunderland on the 27th. Thunder was heard, but Lightning 

 was not seen, at Rothbury on the 16th ; at Allenheads on the 

 1st and 9th ; at Wallington on the 20th ; at Bywell on the 16th, 

 23rd, and 29th ; at North Shields on the 2nd, 8th, and 24th. 

 Lightning was seen, but Thunder was not heard, at Acklam, near 

 Middlesbro', on the 18th. Thunderstorms occurred at Allenheads 

 on the 18th ; at Darlington on the 18th ; at Gainford on the 

 18th ; at Acklam on the 18th. Aurora Boreales were seen at 

 Wallington on the 21st; at North Shields on the 24th; at "Whitley 

 on the 23rd, 24th, and 25th ; at Sunderland on the 21st, 23rd, 

 24th, and 25th ; at Durham on the 21st and 24th. 



