i>l 



ISTasnetical Observations. 



(Dtc. 



weights both of simple and compound atoms. (New System of 

 Chemical Philosophy.) Davy, though he has not adopted the 

 atomic theory of Dalton, has embraced the doctrine of definite 

 proportions ; and what Dalton calls an atom, he calls a propor- 

 tion. (Dement; of Chemical Philosophy.) Dr. Young, in his 

 Introduction to Medical Literature, has made similar determina- 

 tions ; but what Davy calls proportion, Young calls combining 

 weight. But none of these philusophers have attempted to give 

 anv great degree of exactness to their determinations. They 

 have frequently even omitted stating the experiments from which 

 these determinations are derived. The method which they have 

 adopted of giving round numbers, though it facilitates the recol- 

 lection and calculation, is scarcely consistent with the object of 

 scientific researches, and ought to be rejected : for even sup- 

 posing that perfect exactness could never be obtained, it is 

 nevertheless the object towards which all our efforts should be 

 directed. 



(7b be continued.) 



ARTICLE VIII. 



Magnet ical Observations at Hackney Wick. By Col. Beaufoy, 

 JSIagnetical Observations. 



Latitude 51" 32' 40" North. Longitude West iu Time 6'SV a -. 



1813. 



Mean of 



Observations 



in Oct. 



Ditto in Sept. 



{ 



15 41 '-K v 

 22 53 J 



e«r. 



Mflfrning at 8 h 45' .. .Variation 2i : 



Noon at 1 59 Ditto 24 



Evening at — — ...Ditto — — — Not ob. ; . 



Morcim; at 8 53 Ditto 24 15 40 ) 



Noon ' at 2 02 Ditto 24 22 32 [ West. 



Evening ;>.t 6 0J,... Ditto 24 10 04 ) 



