XIII. 



CLIMATOLOGICAL OBSERVATIONS TAKEN IN HERTFORDSHIRE 



IN THE YEAR 1891. 



By John Hopkinson, F.L.S., F.G.S., F.R.Met.Soc. 



Bead at Watford, list March, 1893. 



PLATE III. 



Observations have been made in the year 1891 at the five stations 

 for which the reports for the four previous years were drawn up, 

 and therefore I give the same series of tables as before. 



The mean temperature of Hertfordshire in 1891, deduced from 

 observations at these five stations, was 0°1 above that of the four 

 previous years, and l°-3 below the mean of 1882-86. The moan 

 daily range was 0°-4 more than in 1887-90, and 0°-4 less than in 

 1882-86. The extreme range was rather greater than in 1889, and 

 rather less than in 1890. The relative humidity was a little greater 

 than in the four pre\'ious years, the amount of cloud a little less, 

 and the rainfall considerably greater, and on a much larger number 

 of days. On the whole, the year 1891 may be said to have been 

 cold and wet, with about an average range of temperature. February 

 Avas unprecedcntecUy dry, and October excessively wet. 



The observations are made at 9 a.m. at all the stations, the maxi- 

 mum temperatiire and rainfall being entered to the previous day. 



ROYSTOI^. 



(London Road.) 

 Latitude: 52° 2' 34" N. Longitude : 0° 1' 8" W. Altitude: 



301 feet. 

 Observer: Hale fFortham, F.R.Met.Soc. 



