Watertown republican. [volume] (Watertown, Wis.) 1860-1906, 1882-05-24

the lustre and gloss, just as allsilk goods
are said to be treated. By this process
it is claimed that not only cotton and
wooden, but-what is apparently much
more likely-dull, lustreless, low-priced
silks can be treated with solution of
better and more lustrous silk, and be
rendered scarcely distinguishable from
the best goods. The precipitated silk is
said to adhere Chicago Times.
PLEASANT EXPERIMENT WITH SALT.
Do you want to grow salt and at the
same time, have an interesting, hand
some ornament? The proceeding is a
novel chemical experiment that may be
tried by any one. Put in goblet one
tablespoonful of salt and one spoonful of
bluing; fill the goblet two-thirds full of
water and set it in a position where it
will have plenty of warmth and sunlight.
In little while sparkling crystals will
commence forming on the outside OF the
glass, and it is both novel and inter
esting sight to watch it gradually grow
ing day by day until the outside of the
gobletis entirely covered over with beau
tiful white crystals. Another variation
of this beautiful experiment would be to
take goblet with the base broken off
and fasten it in the center of thin
piece of board, which may be round,
square or oblong. After the crystals
have formed on the glass, set it on a
tiny wall bracket, and place bright
holiday or birthday card IN front of it;
this will hide the base, on which no
crystals will form. After this is done
fill the goblet with flowers or dried
grasses, and you will have vase which
will cost comparatively little, and in re-
ality adds to the bric-a-brac of the room.
Troy Times.
USING GUN IN PHOTOGRAPHY.
In taking instantaneous photographs it
is well-known that some difficulty is ex-
perienced in bringing the object into the
field of the camera. The process of
taking aim at, for instance, a moving OBJ
ject, such as ship, has sometimes to be
repeated several times, and in the end
the result is unsatisfactory. M. Marcy
has to get over this difficulty, designed
a Photographic gun. This is neither
more nor less than very large revolver,
with a stock to put to the shoulder.
This barrel is telescope-that is to say,
it contains the lenses of a camera; there
are 16 apertures which take the place of
the chambers. The photographer puts
in sensitized plate behind these aper-
lures, and performing an operation
analogous to cooking the weapon, he is
ready for the field. On seeing a flying
bird he takes aim and pulls the trigger,
the chamber revolves once, and in one
second he obtains 16 little pictures of the
bird in various positions. Hitherto NJ.
Marcy has made the use of his photo
graphic gun for the purpose of investi-
eating the flight of birds. In this case
clearness of definition is of little conse-
quence, so long as dark image or sill
houette the shape of the bird is obtained,
so that it matters little whether the OBJ
ject aimed at be focused or not; but it
is obvious that In multitude of other
cases the image can be obtained perfect
ly in focus. Indeed, it will be seen that
the system of thus carrying a small
camera to be steadied against the shout
der admits of extension, and may prove
of the utmost service to the photo
grapher.-LOndOa Engineering.