
          808

Marle

According to the Analysis made by Mr Henry Seybert
communicated to the Philadelphia Society for promoting
Agriculture published May 25 in Poulson paper (1822) the
green Earth commonly called Marle in New Jersey, and which
has been advantageously used in some situations as a manure
consists of
[table begins]
per 100 parts
Analysis . . A. Water                                              09.800
Analysis . . B. Silica                                                49.833
Analysis . . C. Protoxide of Iron                          21.533
Analysis . . D. Magnesia                                        01.833
Analysis . . C. Alumina                                          06.000
Analysis . . C. Protoxide of chrome                   a trace
Analysis . . E. Potash                                              10.120
[underscore]
Loss                                                                             99.119
. 881
[underscore]
100.000
[table ends]

This mineral of a dark green colour occurs earthy &
granular; it is opake [opaque] and without lustre; when
breathed upon it omits an argillaceous odour;
specific gravity 2.777; Before the blow pipe it fuses
and yields a black vitreous globule.
A portion of the mineral finely pulverized was
boiled in water; the filtered liquor tested with
Nitrate of Barytes, Nitrate of Silver and Oxalate of Ammonia
gave only slight traces of Sulphuric and Muriatic
acids and lime.  The liquor on examination proved to be
free from iron. Muriatic acid occasions no
effervesence with this Substance.
The Earth was from Rancocus Creek N.J.
        