JOURNAL 



OF 



Natural philosophy, chemistry, 

 the arts. 



DECEMBER, 1802, 



ARTICLE t 



j)efcription of an Improvement of Woulfe's 'Apparatus, by zvhick 

 the great Inconveniencics of that Method of conneSUng the Vef* 

 . fels are obviated. In a Letter from Mr. John Murray. 



Edinburgh, Sept. 18, 1802. 



To Mr. NICHOLSON. i 



SIR, 



1 SEND you a drawing of an improvement in Woulfe's ap- 

 paratus, which I believe I may recommend with confidence 

 to chemifts* 



In the apparatus on the common conftrufiion it Is extremely It is fcartely 

 difficult, I might perhaps fay impoffible, to have a feries of JJ^Jj^jS 

 bottles connected by tubes which are ground air tight, and a - ir tight tubes 

 hence the neceffity of employing luting to clofe the joinings, without luting, 

 an operation extremely troublefome when done with accuracy. 

 This difficulty of fitting the bent tubes to the bottles by grind- 

 ing, arifes from the conftruction of "the apparatus itfelf; for if The caufe why J 

 one leg of the tube be ground into the bottle from which it 

 ilfues, it will be found fcarcely poflible to grind the other leg 

 with accuracy into the other bottle, fo as to fit it at the precife- 



Vol. Ill,— Decbmier, 1802. Q point 



