_French chalk_: A variety of the mineral called talc, unctuous to the
touch, of greenish color, glossy, soft, and easily scratched, and
leaving a silvery line when drawn on paper. It is used for marking
on cloth, and extracting grease-spots.
_Fuller's earth_: A species of clay remarkable for its property of
absorbing oil, for which reason it is valuable for extracting grease
from cloth, etc. It is used by fullers in scouring and cleansing
cloth, whence its name.
_Fustic_: The wood of a tree which grows in the West-Indies called
_Morus tinctoria_. It affords a durable but not very brilliant
yellow dye, and is also used in producing some greens and drab colors.
_Gastric_: (From the Greek [Transliterated: gasths], _gaster_, the
belly,) belonging or relating to the belly, or stomach. _Gastric
juice_: The fluid which dissolves the food in the stomach. It is
limpid, like water, of a saltish taste, and without odor.
_Geology_: The science which treats of the formation of the earth.
_Gluten_: The glue-like, sticky, tenacious substance which gives
adhesiveness to dough. The principle of gelly, (now generally written
_jelly_.
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