39 



Thus in the measurement of Etna by Sir John Herschel in 1824 : Sir 

 John measured the mountain by barometer and came to the conclusion that 

 the altitude was 10,872 feet, or very nearly so. By trigonometrical survey, 

 tlxe altitude is found to be 10,874 feet 6 inches. 



I was myself very successful in a single visit to Ganvay Hill, October 

 2nd, 1868, and here transcribe my own account from the " Transactions " for 

 1871 :— 



"GarwayHill was measiu-ed a second time on October 2nd, 1868. The 

 day was calm, and everything most favomable. Thi-ee barometrical readings 

 were taken simultaneously, at intervals of half an hour each, both on Garway 

 and at Hereford. 



"The mean of the three barometrical readings at Hereford was 29-928 

 I inches corrected ; and the mean of the three readings of the detached thermo- 

 meter 507. 



" The mean of the three barometrical readings taken on Garway was 

 28 "832 inches corrected ; and the mean of the three readings of the detached 

 thermometer 47". 



" The barometrical difference between Hereford and Garway was 1'096 

 inch, and the mean temperature (Hereford and Garway) 48 '8. This, allow- 

 ing for height of barometers above the ground, showed an altitude of l,Oi:i 

 feet 10 inches, or, in round numbers, 1,014 feet. Add to this 182 feet, the 

 height of Eichmond-place above the sea, and we have 1,190 feet for the height 

 of our mountain. The Ordnance siu-vey determines it to be 1,197 feet. As the 

 barometers were lOJ miles apart, tliis was a most satisfactory instance of 

 barometrical measurement." 



The following barometrical altitudes are given as close approximations to 

 the truth, and every succeeding observation wUl, of course, add to the cer- 

 tainty : — 



That portion of the Black Mountain which is marked Hatterall-hill in 

 the Ordnance Map, 1747 "61 feet above the level of the sea ; Garway-hill, 1196 ; 

 Aconibury, 916-18; Lady Lift, 915-18; Deerfold Camp, 912-98 ; Seager-hill, 

 886-78; Egdon-hiU, 842-88; Marcle-hiU, 769-78; Backbury-hill, 729-18; 

 Credenhill, 713-38 ; Hough Wood, 623-78 ; Dinedor, 605-88 ; Pool Cottage, 

 1485-18; Whitfield, 427-78; Bryngwyn, 426-98 ; SeUack Vicarage, 242-78 ; Mr. 

 Ballard's Lavni at Tupsley, 233-35. 



During 1872 my observations went on as usual, but I made few notes ; 

 those given below, however, will be found sufficient to direct attention to the 

 most interesting meteorological events during the wettest year recorded in 

 this county. In 1852, the next in order of remarkably wet years, so far, at 

 least, as our county is in question, there was only one rainguage at work 

 during the whole year. The observer was Benjamin Boddington, Esq., of 

 Burcher Court, Titley. His record for 1852 is as follows : — January, 5*57 

 inches; Eebruarj', 2-70; March, 0-40 ; April, 0-60; May, 1-83; June, 4-88; 

 July, 2-26; August, 5-66; September, 2-49; October, 3-18; November, 9.52; 



