{"newspaper_name": "Richmond palladium.", "edition": "01", "page": "pNone", "byline": ""}
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CLAss.-It is difficult to forsee to what perfec-
ton tho manufacture of glass may be brought
and to what purpose tho article may yet be ap-
plied. Thc balance spring Of a chronometer IS
now made of glass substitute for steel. and
possesses greater degree Of elasticity and n
greater power of resisting tho alterations Of heat
and cold. 4 chronometer with glass balance
spring was son, to tho North sea. and exposed to
a competition Of nine others, and tho result Of
the experiment report IN favor OF the chro-
norreter with glass spring In mandatory
in France, they re now making glass pipes for
the conveyance Of water. which cost near 30 per
cent. less than the iron pipes now used, and will
bear far greater external pressure.