iSlS.j Astronomical Qhsei'vaiions at Hackney PFick, 37 1 



Ohservations on the Variation of the Needle, 





Morniiia: Observ. 





Noon Observ. 



E 



vening Obser 



V, 



Month. 

































Hour. 



Variation. 



Hour. 



Yariation. 



Hour. 



Variation. ' 



March 30 



gh 



30' 



24° 



10' 



29" 



12''» 



23' 



24° 



24' 



16" 



2h 



15' 





19' 



51" 



Ditto 3i 



8 



37 



24 



9 



12 



12 



20 



24 



24 



12 



2 



50 



24 



11 



42 



April 2 



8 



50 





9 



IS 



1 



50 



24 



24 



25 



5 



05 



24 



11 



28 



Ditto 3 



8 



20 



24 



5 



34 



1 



00 



24 



25 



09 













Ditto 4 













12 



35 



24 



21 



SO 













Ditto 5 



rr 

 i 



gfi 



3u 





(I 

 o 



9/1 























Ditto 6 













i 



00 



21 



24 



13 



5 



30 



24 



13 



14 



Ditto 7 



9 



30 



24 



9 



10 





09 



24 



11 



58 



3 



10 



24 



18 



23 * 



Ditto 8 



9 



00 



24 



7 



04 























Tk;++r» o 

 Uiiio y 



8 



30 



24 



11 



00 





35 



24 



25 



19 













Ditto 10 



6 



35 



24 



12 



17 













5 



15 



24 



17 



44 



Ditto 11 



8 



03 



24 



10 



19 



11 



25 



24 



18 



S3 



9 



30 



24 



n 



18 



Ditto 12 



8 



05 



24 



9 



37 



11 



30 



24 



18 



22 



5 



30 



24 



10 



43 



Ditto 13 



7 



10 



24 



7 



20 



11 



45 



24 



22 



02 



5 



30 



24 



12 



50 



Ditto 14 



9 



00 



24 



10 



53 



1 



05 



24 



20 



27 



5 



40 



24 



19 



i>7 



Ditto IS 



9 



40 



24 



10 



50 



1 



20 



24 



20 



23 



4 



20 



24 



12 



32 



Ditto le 



8 



50 



24 



10 



26 





30 



24 



17 



51 



7 



20 



24 



15 



6 



Mean 



9 



9 



24 



9 



20 



12 



53 



124 



21 



20 



5 



10 



24 



15 



24 



« Wind S. E. to S. W. and hazy. 



I can assign no cause why the Noon Observation on the 

 is so much less than the others* 



Article VIII, 



Analyses of Books. 



Elements of Chemical Philosophy. By Sir Humphry Davyj 

 LL.D. See. R. S. Prof. Chem. R. 1. and B. A. M. R. 1. 

 F.R.S,E. M.R.LA. Member of the Royal Academy of Stock- 

 holm ; of the Imperial Med. and Chirur. Ac'demy of St. 

 Petersburgh ; of the American Philosophical Society ; and 

 Honorary Member of the Societies of Dublin and Manciicster, 

 the Physical Society of Edinburgh, and the Medical Society of 

 London. Part L Vol, L London: Johnson and Co, 1812, 

 8vo. p, 511. 



The celebrated author of this work be,8;ins with an introduc- 

 tion, in which he gives a very comprehensive and entertaining 

 account of the history of chemistry, from its first rude ciawn 

 among the Arabians down to our own tirnes. This introduction 

 "is entitled to almost uniimited praisej both on account of tb« 



2 A 2 



