Massachusetts spy and Worcester advertiser. [volume] ([Worcester, Mass.]) 1823-1825, 1824-09-08

snps, eaCh individual slip containing a
great number of types of the same let
ter, which are called file Of letters.
The case containing the files are placed
in the upper part fthe composing ma
chine, and by means Of keys, like those
Of piano-forte, the compositor can re-
lease from any file the type which he
wants. The type thus liberated, is led,
by collecting arms into acurved channel
which answers the purpose ola compos-
ing stick. From this channel they may
be taken in words or sentences land form
ed by the hand into pages, by means of
a block placed at the side of the ma
chine. The third machine for taking
impressions from the types, evinces
much ingenuity but cannot be under
stood without several drawings. After
the types have been used, and the re-
quisite number of impressions obtained,
they are melted and recast as 5efore so
that every sheet is printed with new
type. Edinburgh Journal Of Science.
Optical Wonder.-Mr. Scoresby IS Jour
nal of a voyage to the northern whale
fishery, recently published, contains
much information respecting the refrac
tons which are usual in high ATTITUDES
one very singular instance deserves TO
be noticed: " On my return to the ship,
about II o'clock, the night was beauti-
fully fine, land the air quite mild. The at
mosphere, in consequence of its warmth,
being in highly reflective state, a
great many curious appearances were
presented by the land and ice-bergs.
The most extraordinary effect of this
state Of the atmosphere, however, was
the distinct inverted image of ship in
the clear sky, over the middle of a large
bay or inlet before mentioned, the ship
itself being entirely beyond the horizon.
Appearances of this kind have before
noticed, but the peculiarities of this were
the perfection of the image, and the
great distance of the vessel that it rep
resented. 1t was SO extremely well de-
fined, that, when examined with tele-
scope by Dolland, l could distinguish ev-
cry sail, the general "rig of the ship"
and its particular character; insomuch,
that confidently pronounced it to be my
fathers ship, "The Fame,' which it
afterwards proved TO be though, on
comparing notes with my father, found
that our relative position at the time,
gave our distance from one another
very nearly thirty miles beyond the no.
rizon, and some leagues beyond the linn
il of direct vision. Twas so struck by
the popularity of the circumstance, that
mentioned ii to the officer ofthe watch,
stating my full conviction that the Fame
was then cruising in the neighboring in
let"
The Prcventivss Of Sleep.--The
most comm on preventives Of sleep
may be traced to the stomach, which is
by many, set TO work at bed time, and
kept at it for the night. Ifyou eat hot
heavy supper, or which is the same
thing, late dinner, you cannot in any
conscience, expect to sleep just as
the stream of blood in the brain is be-
ginning TO make its natural evening
pause, your heavy supper or your late
dinner, stirs it EDWARDS in an increasing
current, which nothing has any chance
of safely stopping again, except the
stomach pump. Opium indeed will do,
bnt not safely; fer it will stop the diges-
ton, as we'll as the current of the blood !;
and after dose of opium your supper
will in the morning be corrupted mass,
which will probably bring you in for a
fever, 4 fit of govt, the jaundice or ap-
oplexy. A more agreeable plan would
be to have supper early, at least three
hours before going to bed-in which
case the heavier work Of the stomach
would be completed, and It would then
allow the nerves and the brain to be
quiet, and the blood 70 diminish its We
locity. Tea is by many accused as a
preventive of sleep, and it may be so in
the following way in the first place
the hot water of the tea passes immedi-
ately from the stomach into the blood,
and by making it thinner, must tacili-
tate its current through the body. In
the second place the tea acting as a
stimulant to the nerves, spurs them Into
activity, and increases the flow of blood
into the brain. That tea has not always
this effect, depends on the peculiarly Of
constitution. Some, for example, may
have their blood so thick that all
the water Of a basin or two of tea may
not be sufficient to thin it; and others,
nerves so dull that tea may spur with
out arousing them. The same remarks
apply to cold feet. Be careful Of your
feet if you can, procure wash leather
or heecy hosiery socks, with silk ones
over them, when necessary. The in
valid and sedentary ought ALWAYS indeed