94 



METEOROLOGICAL OBSERVATIONS FOR 1867. 



Bt E, J. ISBELL, Esq., Heeefokd. 



Our meteorological observations have been carried on throxigh another 

 year, and duly recorded, -without any interruption of importance or any serious 

 accident to instruments, and the results are now presented to the Club in the 

 form of tables drawn up with great care. 



It was found impossible to condense our matter this year into the limits 

 of one table, or indeed into two, we have, therefore, made out three, arranging 

 our work as follows : — 



Table 1. Barometer, rainfall, wind. 



Table 2. Thermometers. 



Tables. Ozone. 



It will be seen by a glance at the table (1) that the range of the barometer 

 has been great during the past year, the highest reading at 9 a.m.— the regixlar 

 hour of observation— being 30-5SG, and the lowest 28-532. The former of these 

 readings was recorded on the 2nd of March, and the latter on the 8th of January. 

 "With respect to the last-named reading, it should be noted that at 9 a.m. the 

 barometer was rising, and that at 3 a.m. the mercviry stood at 28"410, wliick I 

 believe to have been the greatest depression during the year. 



The barometer was remarkably high and steady during the whole of 

 November, or nearly the whole ; the 9 a.m. readings having been above 30 inches 

 on 22 days, and the mean of the readings for the whole month being 30 '093 inches. 



I mentioned in the notes of last year that we do not rediice oiir barometer 

 readings to sea-level, but correct for temperature and error of instrument only, 

 so that the figures given weekly in the Hereford Times may enable those who 

 wish to do so to ascertain whether their barometers are correct or the contrai-y, 

 and give observers who possess standards an opportunity of comparing their 

 observations -with those taken daily at Hereford. 



The highest and lowest barometer readings in each month, together with 

 the monthly means, will be found in the table (1). I would have added the 

 date in each case, but found the space insufficient. 



The mean reading for the yeai- was 29768, the average in England at sea- 

 level being 29-95. Hereford is, I believe, about 200 feet above sea-level, so 

 that the Hereford mean reduced to sea-level would agree almost exactly -with 

 the given average of the barometer at sea-level in England, 



Early in the year a proposal was made by Mr. G. J. Symons that all 

 observers who had good barometers should undertake a series of observations 

 simultaneously, beginning on May 24th and ending on June 2nd ; the barometers 

 to be read off and recorded each day at 9 a,m, and 3 and 9 p.m. if possible ; but 



