just below the water level in the funnel,
the filtering process goes on continuously with no overflow of the
funnel.

As soon as the solution in the funnel is below the cork, air is
let into the flask and a small quantity of new solution is let
down into the funnel. The process works well and needs no
watching, and instead of the filtrate being in a large filter
paper, it is on one small piece and can be handled with ease.
--Contributed by Loren Ward, Des Moines, Iowa.

** A Postcard Rack [25]

The illustration shows a rack for postcards. Those having houses

[Illustration: Finished Rack]

with mission-style furniture can make such a rack of the same
material as the desk, table or room furnishings and finish it in
the same manner.

The dimensions are given in the detail sketch. The two ends are
cut from 1/4-in. material, the bottom being 3/8 in. thick. Only
three pieces are required, and as they are simple in design,
anyone can cut them out with a

[Illustration: Details of the Rack]

saw, plane and pocket knife.
--Contributed by Wm. Rosenberg, Worcester, Mass.

** Substitute Shoe Horn [25]

A good substitute for a shoe horn is a handkerchief or any piece
cloth used in the following way: Allow part of the handkerchief or
cloth to enter the shoe, place the toe of the foot in the shoe so
as to hold down the cloth, and by pulling up on the cloth so as to
keep it taut around the heel the foot will slide into the shoe
just as easily as if a shoe horn were used.
--Contributed by Thomas E. Dobbins, Glenbrook, Conn.

** Building a Small Photographic Dark Room [26]

In building a photographic dark room, it is necessary to make it
perfectly light-tight, the best material to use being matched
boards. These boards are tongued and grooved and when put together
effectually prevent the entrance of light.

The next important thing to be considered is to make it
weather-tight, and as far as the sides are concerned the matched
boards will do this also, but it is necessary to cover the roof
with felt or water-proof paper.

The best thickness for the boards is 1 in., but for cheapness 3/4
in. will do as well, yet the saving is so little that the 1-in.
boards are preferable.

The dark room shown in the accompanying sketch measures 3 ft. 6
in. by 2 ft. 6 in., the height to the eaves being 6 ft. Form the
two sides shown in Fig 1, fixing the crosspieces which hold the
boards together in such positions that th