222 



J. HOPKINSON THE WEATHER 



district, and Holwell House, Hatfield, in the Upper Lea, 

 removed to the supplementary table as the daily returns have 

 not been received ; Fairhill, Berkhamsted, in the Bulbourne, 

 removed to that table o^n-ing to the daily record not being com- 

 plete ; Knebworth Manor House, in the Beane, discontinued 

 through the removal of the observer ; and Hillside, Buntiugford, 

 in the Rib, through the return not having been received. We 

 thus gain one station in the Ver river-district, one in the Brent, 

 and one in the Ash ; and lose one in the Thame district and one 

 in the Beane. 



The supplementary rainfall table gives the annual rainfall 

 collected by fifteen other gauges in the county. Five of these 

 records are those of additional gauges at stations at which the 

 rainfall is given in the principal table ; four are those which 

 have been omitted from that table for various reasons ; and six 

 are from ' British Eainfall,' 1906. 



An alteration has been made in the symbols in the last 

 column of the principal rainfall table and the fifth column of 

 the supplementary table. They now are : B, altitude taken by 

 barometer ; L, altitude ascertained by levelling from an Ordnance 

 Survey bench-mark ; and T, altitude ascertained approximately 

 from the same source. This has been done on account of 

 the difiiculty of satisfactorily making-up the former symbol 

 representing a bench-mark, now altered to L, a symbol not 

 before adopted as it has a different meaning in ' British 

 Rainfall.' 



The hour of observation is in all cases 9 a.m., and all the 

 observations are entered to the same day except the rainfall and 

 the maximum temperature, which are entered to the previous 

 day. Shade temperatures only are given : those for Bennington, 

 Berkhamsted, and St. Albans from thermometers in Stevenson 

 screens, and those for New Barnet from thermometers under a 

 Glaisher stand, showing a greater range but about the same mean. 



Table I. — Results of Glimatological Ohservations tahen in 

 Hertfordshire in the Year 1906. 



