You
can display either color called for.
--Contributed by Ralph Gingrich, Chicago.
** How to Make a Rain Gauge [64]
An accurate rain gauge may be easily constructed from galvanized
iron, as shown in the sketch herewith. The funnel, A, overlaps and
rests on the body, B, and discharges into the tube, C, the area of
which is one-tenth that of the top of the funnel. The depth of the
water in C is thus ten times the actual rainfall, so that by
measuring it with a stick marked off in tenths of an inch, we
obtain the result in hundredths of an inch.
A good size to make the rain gauge is as follows: A, 8 in.
diameter; C, 2.53 in. ; length of C, about 20 in. It should be
placed in an exposed location, so that no inaccuracy will occur
from wind currents. To find the fall of snow, pour a known
quantity
[Illustration: Rain Gauge]
of warm water on the snow contained in the funnel and deduct the
quantity poured in from the total amount in the tube.
--Contributed by Thurston Hendrickson, Long Branch, N.J.
** How to Make an Aquarium [64]
In making an aquarium, the first thing to decide on is the size.
Pages:
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164