462 METEOROLOGICAL REPORT, 1871, BY THE 



at Darlington on the 18th and 30th ; at Acklam, near Middles- 

 bro', on the 18th and 20th. Lightning was seen, but Thunder 

 was not heard, at Acklam on the 15th and 19th. Thunder was 

 heard, but Lightning was not seen, at Allenheads on the 18th 

 and 25th ; at Meldon on the 19th ; at Cresswell on the 12th and 

 19th ; at North Shields on the 17th, 19th, and 28th ; at Bywell 

 on the 19th. Hail fell at Saughtree on the 25th ; at Darlington 

 on the 16th. Aurora Borealis was seen at North Sunderland 

 on the 4th. 



July. — 



' ' Rainbow to windward, f onl fall the day ; 

 Rainbow to leeward, damp runs away." 



— Old Nautical Saw. 



Greenwich. — The cold weather which had been generally pre- 

 valent throughout the preceding quarter continued, with the 

 slight exception of the few days, July 14th to 21st, till August 

 the 5th. 



The mean temperature of July was 61 - 7°, being 0-1° higher 

 than the average of 100 years, but lower than the corresponding 

 values in 1870, 1869, and 1868. 



The mean high day temperatures of July were lower than the 

 average. The mean low night temperatures were above the 

 average. The daily range of temperature was less than the 

 average by 2-5°. 



The changes of atmospheric pressure were small but frequent, 

 the tendency being higher in the middle than at the beginning 

 and end of the month. The maximum, 30'06 inches occurred 

 on the 16th, and the minimum, 29'24 inches on the 24th. The 

 range was 0-82 inch. 



The fall of rain was # 7 inch in defect. 



North Sunderland. — Damp, wet month. Prevailing winds 

 W. and S.W. 



Wallington. — The weather was fine and warm. Brilliant sun- 

 shine and frequent showers of rain made the crops both in field 

 and garden advance very rapidly. 



