188 Mr. Nixon on the Measurement (by Trigonometry) of the 



Hence if 36 is the equivalent of chlorine, that of barium 

 will be 69'832, or very near 70 as stated by Dr. Thomson; 

 but if the calculation be continued, still taking the results of 

 my experiments as its basis, the equivalent of sulphuric acid 

 will turn out to be 40 '901 instead of 40. From these con- 

 siderations it appears evident that at least one of the equivalent 

 numbers concerned in the calculation must be incorrect. I 

 abstain, however, from offering any further opinion on this 

 point at present, as it will form the subject of another com- 

 munication. 



XXX. On the Measurement (by Trigonometry) of the Heights 

 of the 'principal Hills of Swaledale, Yorkshire. By John 

 Nixon, Esq. 



[Continued from page 128.] 

 At Bakestone Edge. 



A 1 



June 15th, 1829. Height of Eye 3\5 feet. 



N alternately bright and cloudy afternoon, attended with 

 ■■ gusts of wind from the south-west. The observations were 



discontinued, in consequence of the occurrence of a storm of 



heavy rain and mist. 



Satron Hangers ... 47 16dep, 



The Tail Brigg ... 12 30 ... 



E.StonesdaleMoor 9 11 ... 



Keasdon 54 8 ... 



(1828) Pickington Ridge... 12 20 ... 



Shunnor 53 14elev 



(1828) 53 9 ... 



Water Crag 25 28 ... 



(1828) 25 10 



NineStandardsHill 13 22 

 Hugh Seat 26 56 



Feet. 



145*6 lower. 

 127*6 ... 



56-6 ... 

 284-0 ... 



66-9 ... 



428-3higher. 



268-6 

 250-6 

 407-1 



1-5 



2-5 



35 



4-5 



9 



1-5 



5 



2-5 



4 



1-5 



0-5 



*#* The height of the eye in the observations of 1828 

 was 4*5 feet. 



At Shunnor Fell. 

 June 17th, 1829. Height of Eye 4-5 feet. 

 A beautifully clear afternoon. Light clouds, alternately from 

 the north-west and south-west, passed over, almost without 

 rain, but the horizon eastward had generally the appearance 

 of heavy showers. 



Hugh 



