Baromeliic Observallons. 



317 



sea, it must be conbidered as a valuable station for ascertaining 

 the point of zero, if care is taken to obtain the exact altitude of 

 the surface of the mercury in the basin of the barometer above 

 the said point. Yours most respectfully. 



To Mr. Tilloch. Thomas Squire. 



Bristol, April 19, 1821. 

 SrR, — I send you the barometrical observations for March and 

 April, taken at the times proposed by Mr. Bevan; and am, sir. 

 Your obedient servant, 



Edward Jones. 



Leighton, April 25, 1821 . 



Sir, — Engagements that took me from home, have this month 

 prevented me from sending the observations made at this place 

 on the barometer, before the present late period in the month. If 

 not too late, they are at your service. 



It is proper to observe, that the first observation was made a 

 I'M minutes after eight ; tjic remainder at the proper time. 



rr.i. 



