Miscellaneous Localities oy Minerals. 39 
is an instance of one near Oxford Bridge estimated by 
Capt. Partridge to be about 500 feet in height. The 
but on examination, are found to contain carbonate of lime. 
Rocks that have fallen from this mountain in ‘old time” 
now form a good soil, while those known to have fallen fif- 
ty years ago, scarcely begin to change their color. A grad- 
ually retiring sea will explain to us (and I know of no oth- 
er way to account for the fact) why channels were cut 
deeper by streams, in rocks on high lands, than in those 
lower down, as mentioned by Mr. Maclure in your Jour- 
nal for January last, notwithstanding that the rocks are 
harder and the accumulation of water, as well as of gravel 
and sand, greater below. Ss 
ve Yours with esteem, 
Art. [X.—Notices of Miscellaneous Localities of Minerals. 
1. By Da. Joseru Barratt. 
TO PROFESSOR SILLIMAN. 
Sir— 
T wave forwarded for publication in the American Jour- 
nal o lence, a list of the minerals discovered in 
Philipstown, Highlands of N.Y. Specimens of the most 
interesting minerals berein mentioned, have already been 
pleatifully sent away and are to be found in many of the 
mineralogical cabinets of this country; a desire to render 
the list more complete has occasioned a delay in publish- 
ing for the lagt three years. « 
In Philipstown, Putnam County, New-York. 
er Hard white Marble, in blocks, its texture is very com- 
2. Precious Serpentine, in loose pieces, and variously 
mixed with the marble; some of the serpentine is very 
beautiful. | ‘ 
