318 Meteorological Ohservationsfor August 1829. 



To J. NichoUs, Pershall, Stafford, gentleman, for improvements in 

 the lever, ami the application of its power. — 25th of July. — 2 months. 



To J.Bates, Bishopsgate-street, merchant, for his improved method 

 of constructing steam-boilers or generators, whereby the bulk of the 

 boiler, or generator, and the consumption of fuel are considerably 

 reduced. — 1st of August.— 6 months. 



METEOROLOGICAL OBSERVATIONS FOR AUGUST 1829. 

 GospoH. — Numerical Results Jbr the Month. 

 Barom. Max. 30-36 Aug. 2. Wind S.W.— Min. 29-32 Aug. 20. Wind W. 

 Range of the mercury 1-04. 



Mean barometrical pressure for the month 29-963 



Spaces described by the rising and falling of the mercury 7'340 



Greatest variation in 24 hours 0-600. — Number of changes 13. 

 Therm. Max. 74° Aug. 7- Wind S.E.— Min. 46=^ Aug. 16. Wind N.W. 

 Ranije 28°.— Mean tenip.of exter. air 60°-47- For 31 days with in ^^61-40 

 Max^ var. in 24 hours 19°-00— Mean temp, of spring-vvatei- at 8 A.M. 54-33 



De Luc's Whalebone Hygrometer. 

 Greatest humidity of the atmosphere in the morning of the 23rd ... 93° 

 Greatest dryness of the atmosphere in the afternoon of the 21st... 48 



Ranije of the index 47 



Mean at 2 P.M. 62=-2.— INIean at 8 A.M. 69°-3.— Mean at 8 P.M. 73-5 



of three observations each day at 8, 2, and 8 o'clock 68"3 



Evaporation for the month 2-85 inch. 



Rain in the pkiviameter near the ground 3-33 inch. 



Prevailing winds, S.W. and W. 



Summary of the Weather, 

 A clear sky, 2j fine, with various modifications of clouds, 14; an over- 

 cast sky without rain, 8j foggy, j ; rain, Q\. — Total 31 days. 

 Clouds. 

 Cirrus. Cirrocumulus. Cirrostratus. Stratus. Cumulus. Cumulostr. Nimbus. 

 21 16 28 21 27 19 



Scale of the prevailing Winds. 

 N. N.E. E. S.E. S. S.W. W. N.W. Days. 

 3^ 1 J 3 2 8 8 5.1 31 



General Observations. — The first part of this month to the 12th was to- 

 lerably fine, with occasional showers and brisk winds ; the remainder was 

 wet, very stormy, and a most critical time for getting in the wheat crops in 

 this and in the adjoining counties, but which, under difficult circumstances, 

 has been generally effected without much injury. 



The characteristics of the month being reversed to those of August in 

 general, the state of the weather of late has become proverbial. The 

 maximum heat in the shade here is only 74 degrees, which occurred on 

 the 7th and 9th ; and on several mornings hoar frost was seen in the grass 

 fields before sunrise. 



The mean monthly temperature of the external air is three degrees and 

 one-fifth lower than the mean of August for the last fourteen years. 



The mean temperature of September for the preceding five years, is one 

 degree higher than that of the present month ; nor have we experienced 

 so cold, wet, and windy a summer since the memorable one of 1816,- but 

 yet it must be acknowledged that fine ripening weather has intervened, 

 and that the copious sliowers having been of short duration and followed 



by 



