way with the next row, passing the needle
first through each of the 30 knots made for the first row. Make 30
rows and then tie the last loops to the other iron ring.
Stretchers may be made and put in place and the hammock, strong
and durable, is finished. The work must be carefully and evenly
done. One is apt to have a little trouble getting the first row
right, but after that the work proceeds quite rapidly.

How to Obtain Cheap Dry Batteries [410]

Not very many people realize that good, serviceable dry cells can
be obtained from an automobile garage very cheap. These cells
having been "run out" beyond the required number of amperes for
automobile use, will give excellent service, considering their
cost. Many of them will give two-thirds of their original
amperage. Six of such cells have been in use on my door-bell
circuit for nearly a year. They can be used for other purposes
just as well.
--Contributed by H. H. Cutter.

** How to Make a Water Telescope [410]

[Illustration: The Water Telescope]

Before you decide on a place to cast your hook it is best to look
into the water to see whether any fish are there. Yes, certainly,
you can look into the water and see the fish that are there
swimming about, if you have the proper equipment. What you need is
a water telescope. This is a device made of wood or metal with one
end of glass. When the glass end is submerged, by looking in at
the open end, objects in the water are made plainly visible to a
considerable depth. In Norway, the fishermen use the water
telescope regularly in searching for herring shoals or cod.

All that is necessary to make a wooden water telescope is a long
wooden box, a piece of glass for one

[Illustration: Wooden Water Telescope]

end and some paint and putty for making the seams watertight. Fix
the glass in one end of the box, and leave the other open to look
through.

A tin water telescope is more convenient than the wooden one, but
more difficult to make, The principal essential for this is a
circular piece of glass for the large end. A funnel shaped tin
horn will do for the rest. Solder in the glass at the large end
and the telescope is made. Sinkers consisting of strips of lead
should be soldered on near the bottom to counteract the buoyancy
of the air contained in the watertight funnel and also helps to
submerge the big end. The inside of the funnel should be painted
black to prevent the light from being reflected on the b