160 Mr. Howard's Meteorological Journal. [Aug. 1819. 



p. in. when there was a very heavy storm of large hailstones, 

 which nearly covered the ground. This was attended with vivid 

 lightning to the southward, and thunder at a small distance. 

 29. Overcast. 30. Fine. 



RESULTS (of the half period). 

 Winds Westerly, and chiefly North-west. 



Barometer : Greatest height 30-19 inches. 



Least 29-69 



Mean height 29-995 



Thermometer: Greatest height 78° 



Least 42 



Mean height 58-88 



Rain at Stratford 1-42 inch. 



Rain at Tottenham 1-63 



Mean of the Hygrometer 65° 



Tottenham, Seventh Month, 20, 1819. L. Howard. 



* # # The half tahle now published brings up these observa- 

 tions to the close of the half year. In future, to facilitate the 

 comparison of the daily observations and monthly results with 

 those of other registers, they will be published for every calendar 

 month in the usual way. At the same time, to preserve the 

 original intention, which has succeeded hitherto, of bringing 

 occasionally into view the periodicity of atmospherical changes, 

 the mean results will be inserted in the columns where they now 

 stand daily, at such intervals only as experience has demonstrated 

 to be best adapted for the purpose of forming an annual table, 

 which it is intended in future to publish as a supplement to each 

 year's observations. The whole of the materials for the tables 

 are at present derived from the register kept (under the care of 

 my friend John Gibson) at the laboratory, Stratford, where the 

 due position and accurate adjustment of the instruments have 

 been recently attended to by myself. This arrangement has 

 become necessary to me, as the second volume of the Climate 

 of London will occupy, until it leaves the press, nearly the whole 

 share of attention which I can personally give to the subject. 



L. H. 



