together than 21/2 deg.. The difference of time between
these meridians is then only 10 minutes, which, in general,
can be considered as an insignificant difference between the
civil and the true solar time. The starting point of this
system is the meridian of Greenwich. To the west the system
ought to extend 30 minutes; to the east 21/2 hours, or to a
meridian passing near Moscow.

I suppose as time zero the meridian of Greenwich. The next
meridian to the east is meridian 1. This meridian will not
pass far from the Observatory of Paris, because the
difference between this meridian 1 and the meridian of Paris
is only 40 seconds, an insignificant difference in civil
life. The meridian 1 can be called the meridian of Paris, or
French meridian.

The second meridian (to the east of Greenwich) does not
touch Utrecht, but will pass so close that the time of this
city could, without the least inconvenience, be regulated as
if the difference of time between Greenwich and Utrecht were
exactly 20 minutes. The second meridian would also pass
almost as close to Amsterdam, (22s.,) and would not be far
from Marseilles, (1m. 29s.) In the vicinity of the third
meridian we have, first, Bern, (16s.;) next, a little
further, Turin, (42s.) The fourth meridian is close to
Hamburg, Altona, and Gottingen, (respectively 6s. and 14s.)
Not far from the same meridian is Christiania, although at a
distance of a little over 2 minutes. The fifth meridian
passes also close to three large cities--Rome, (5s.,)
Leipzig, (26s.,) and Copenhagen, (20s.)

The sixth meridian does not touch any city of importance,
but it coincides very nearly with the meridian adopted for
the normal civil time in Sweden; the difference amounts only
to 15 seconds.

The seventh meridian touches the little town of Brieg, in
the vicinity of Breslau, and Koenigsberg is situated two
minutes from the eighth. The ninth meridian passes less than
one minute to the west of Abo, and is situated at a distance
of only a few seconds from Mistra, a town in Greece. The
tenth meridian almost touches Helsingfors in Finland. As
regards the eleventh meridian, I have not been able to find
any locality of importance exactly so situated that it
merits a place in this list, but I can, however, men