66 _ Mineralogy. 
into the Macquartie, and to view it before it received such att» ~ 
accession was our first wish. On the 19th we were gratified by 
falling in with a river running through a most beautiful country, 
and which I should have been well contented to have believed 
the river we were in search of. Accident led us down this: 
stream about a mile, when we were surprised by its junction with 
a river coming from the south, of such width and magnitude as 
to dispel all doubts as to this last being the river we had so long 
anxiously looked for. Short as our resources were, we could 
not resist the temptation this beautiful country offered us, to 
remain two days on the junction of the rivers, for the purpose 
of exarnining the vicinity to as great an extent as possible. 
** Our examination increased the satisfaction we had pre- 
viously felt. As far as the eye could reach in every direction, a 
rich and picturesque country extended, abounding in limestone, 
slate, good timber, and every other requisite that could render 
an uncultivated country desirable. The soil cannot be excelled ; 
whilst a noble river of the first magnitude afforded the means 
of conveying its productions from one part to the other. Where 
I quitted it, its course was northerly, and we were then north 
of the parallel of Port Stephens, being in latitude 32° 45’ S, and 
148° 58’ E. longitude.” 
The course and direction of this river is to be the object of an 
early expedition. 
MINERALOGY. 
To Mr. Tilloch. 
S1r,—Permit me to submit to your consideration, and to that 
of your mineralogical readers, the following remarks and sug- 
gestions respecting a mineral allied in some respects both to 
tremolite and to the zeolites; but which, in my opinion, should 
form a distinct species in mineralogical arrangements. © 
I am, sir, yours very respectfully, 
June 29, 1818. _ LITHOPHILUS. 
In the fifth volume of the Edinburgh Transactions is a paper 
by Dr. Kennedy, containing a description, with an analysis, of a 
mineral found inclosed within a mass of prehnite in the basaltic 
rock upon which Edinburgh Castle is built. Dr. K. considers 
it to be a zeolite;—Mr. Allan in his Tables of Analyses deno- 
minates it aslestous tremolite: while in Professor Jameson’s 
System of Mineralogy it is not mentioned under any appellation 
whatever. To repeat its characters would be foreign to my pre- 
sent purpose; but the following is Dr. Kennedy’s statement of 
the results of his analysis; 
Silica 
