Yet here the tracing of the line becomes the most
interesting. For from the Atlantic, so far we see this production the
effect of shelter and latitude combined. But where does it venture to
launch forth unprotected by shelter, and by the mere force of latitude
alone? Where, for instance, does its northern limit cross the Adriatic?
I learn, that the olive tree resists cold to eight degrees of Reaumur
below the freezing-point, which corresponds to fourteen above zero of
Fahrenheit: and that the orange resists to four degrees below freezing
of Reaumur, which is twenty-three degrees above zero of Fahrenheit.
May 19. _Castelnaudari. St. Feriol. Escamaze. Lampy_. Some sheep and
cattle; no enclosures. St. Feriol, Escamaze, and Lampy are in the
montagnes noires. The country almost entirely waste. Some of it in
shrubbery. The _voute d'Escamaze_ is of one hundred and thirty-five
yards. Round about Castelnaudari the country is hilly, as it has been
constantly from Beziers; it is very rich. Where it is plain, or nearly
plain, the soil is black: in general, however, it is hilly and reddish,
and in corn.
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