396 



Baromtlric Ohservat Inn i. 



in longitude, Args. 5, G, 7, S, !), 10 and .29, are reduced fiotrt 

 4 places to 'A : among those of the R:id Vfctor, Ara;s. 1 and 3 

 are reduced from 5 places to 4 ; Arij<. 2 and 4, from 5 places 

 to 3, an'l Arjrs. 5, f), 7, S, 9, 10 and 29, from 4 places to 3- . 



The general direction given, to strike off one figure (tliat is on 

 the riiihl hand) from all the ariiuments, may do very well for 

 calculating an ordinary ephemeris of the planet ; where the Right 

 Ascension is only wanted exact to the nearest minute of space, 

 or to the nearest second of time : but it appears to me that it can 

 be only partially resorted to in cases where every equation must 

 be set down to the nearest tenth of a second, as is requisite where 

 a comparison is to be made between observed and calculated po- 

 sitions. I am, Stc. 



Aprils, 1821. A^TPOI'lAOS. 



BAROMETRIC OBSERVATIONS. 



Epping, April 24, 1821. 

 Sir, — The following observations I have just received from 

 Pocklington, and which were taken on the i2th of March and 

 9th of April, exactly at the times specified in the following table. 

 IMr. Rngerson is a very attentive meteorologist, and it is to be 

 hoped he will communicate, from time to time, to the Editor of 

 the Phil. Mag., the result of his observations in this curious, inter- 

 esting, and useful branch of phiiosophy. Yours truly, 



Thomas Soitire. 



Crumpsall, Lancashire; May 17, 1821. 

 Sir, — The following observations were made on Monday the 

 14th instant ; those under the head of Crumpsall^ by myself, and 

 those headed .Manchester, by Mr. Tlio.nas Hanson. 



CRUMI"- 



