224 Miscellaneous Localities of Minerals. 
79. Asbestus and Amianthus ; in Jane’s lime quarry, ad- 
joining Isburne’s. 
80. Mountain cork and Rock paper, occur in granular 
limestone, at Isburne’s lime quarry, near Newark. 
81. Dog-tooth Spar, in beautiful crystals; in Jane’s lime 
quarry. 
82. Stalactical carbonate of Lime, of various formations ; 
Jane’s lime quarry. 
83. Limpid Quartz, in hexaedral prisms, terminated by 
pyramids ; in Jane’s lime quarry. 
84. Red oxyde of Titanium, in compressed small prisms : 
in Jane’s lime quarry. 
85. Tremolite, of a beautiful variety ; in Jane’s and Is- 
burne’s quarries. 
86. Fibrolite, abundant on the Kennet turnpike, between 
Centreville and Blue-ball. As this is not in place, it is no 
doubt from the locality on the Brandywine, described by Mr. 
Thomas Nuttall, in Dr. Robinson’s catalogue, as it possesses 
all the characters given in his description. 
87. Chalcedony, a very interesting and extensive locality 
ef this mineral, of various forms, colours, and varieties, occurs 
near rock springs, Little Britain township, Lancaster county. 
This mineral has been noticed in Cleaveland’s Mineralogy, as 
occurring at Little Britain, but as we experienced avery con- 
siderable difficulty in finding this locality, after we had ar- 
rived in Little Britain township, we have thought proper to 
notiee its particular situation, by which it may be readily 
found. This locality commences about 100 yards from Rock 
Springs, on the sides of a small rivulet, and continues a con- 
siderable distance towards its source. Rock Springs are situ- 
ated on the property of Mr. Joel Jackson, and are well known 
through all the neighbouring townships, for their curious 
formation, and for the salubrity of their waters, which issue oul. 
of a serpentine rock, on the ridge formation. 
GEO. W. CARPENTER, 
GEO. SPACKMAN. 
Philadelphia, Nov. 24, 1825. 
N. B.—Geo. W. Carpenter, No. 294 Market-street, will 
exchange the above minerals, of Chester and Delaware, for 
those of other districts. 
