410, Hare’s Substitute for 
1, Both oxyd of tungsten, and oxyd of telluriam were ob- 
tained from all of them. 
3. Many specimens have been examined which have afforded 
tungsten only, and no tellurium. 
At a convenient time, it is hoped that a more scant exa- 
mination of this subject may be presented to the public. 
In the mean time, we may submit to mineralogists and che- 
mists, whether if this is not a new mineral, itis not at least a 
new association of two minerals before known. It has not 
been forgotten that. gold and silver are frequently combined 
with tellurium: neither of them has, however, been disce- 
vered, (although sought after by proper tests) during the above 
trials. 
Yale College, March, 1819. 
S 
“Arr. KVILU. = Substitute for Woulfe’s or Nooth’s Apparatus, 
by Roserr Hare, M. D. Professsor of Chemistry in the Med- 
= ical Department of | ae: wovelahey. y of Pennsylvania, and Mem- 
Ber of | eee Societies. Witha Plate. 
igs agaras: 
F EW subjects have more Pipe ‘the attention of nsenhioks, 
than the means of impregnating fluids with gaseous substances. 
The contrivances of Woulfe and Nooth, especially the former, 
have been almost universally used; and have gained for the 
inventors merited celebrity. Various improvements in 
Woulfe’s bottles have been devised. Still believe an appara- 
tus replete with similar advantages, but less unwieldy, less 
liable to fracture: and having fewer junctures to make at each 
operation, has been agreat desideratum with every practical 
_ chemist. It has, however, ceased to be so with me, since I 
contrived the apparatus which I am about to describe. 
Fig. 1. represents 3 jars placed concentrically within each 
other, and so proportioned and situated, as to admit 2 open- 
necked concentric bell glasses alternately between them. The 
