192 Account of the Geology, Mineralogy, Scenery, &c. 
times diverging from a point, but often radiating from a cen- 
tre ; with nitric acid it forms a jelly. Stilbite I found asso- 
ciated with prehnite, in distinct well defined crystals, some~ 
times in irregular groups, but often insulated. ‘The erysta- 
line form may be described either asa flat four-sided rec- 
tangular prism, acuminated by four planes set on the lat- 
eral edges, or as an elongated, six-sided table, bevelled on 
jour of its lesser sides—the sides are proportioned as two is 
to five, the colour white with pearly lustre ; the structure is 
laminated ; ; itis translucent, softer than prehnite, and does not 
form a jelly with acids. Since my discovery of datholite 
at Patterson, I have sought in vain for this mineral else- 
where in the greenstone ranges ; the vicinity of the falls is 
the only locality for it yet found in this country—and there 
is but one in Europe ;—its character was conjectured by 
Col. Gibbs and ascertained by Dr. Torry by analysis. The 
Patterson datholite will probably be regarded as a new va- 
riety of the Norwegian mineral, differing in crystaline 
form and proportion of constituent parts. ‘The above men- 
tioned minerals are generally found connected with an 
amygdaloid that embraces considerable green earth. 
Mural precipices of dark fine grained fissile greenstone 
are observed at the little falls of the Passaic,jfive miles from 
Patterson—numerous vertical seams cross each other at va- 
rious angles in the ledges, giving to many detached pieces a 
regular prismatic form with three and four sides, often trun+ 
cated on one or more of the lateral edges ; a tabular form 
is common. Rock of similar character was often observed 
in other parts of the Pracknes ridge. Organic remains from 
the ocean, or petrifactions of orthscerites, madrepores, tu- 
bipores, pectinites, terebratulas, encrinites, bilabites, ser- 
pulites, and cther species, generally in an argillaceous base, 
resting on mountain and valley, I have found in the vicin- 
ity of Patterson, and in many parts of the secondary region 
of New-Jersey. 
The situation of Patterson is admirably adapted for a 
manufacturing town—it is within four miles of sloop navi- 
gation upon a never failing stream, that furnishes water pow- 
er sufficient for two hundred ig and mill-seats without 
end ; fuel is abundant and the market can be well supplied 
from the beautiful and fertile valley through which winds the 
Passaic. ‘The streams auxiliary to this river embrace the 
