Elementary lessons on insects . elementarylesson00need Year: 1928 PRESERVING 197 3. Cut and fit sods in flower pots for a few of the live cages shown on page 200. 4. A single caddisworm net-spinning trough will be needed. The making of it is a small job for the manual training shop.* F ig. 70.—A trough for net spinning caddis worms, in which 'made to order' food-catching nets are easily obtained. * The materials needed are: (a) a piece of wire cloth 2' x 3'; (&) two pieces of flooring or other stuff, grooved on one edge and two feet long; (c) two strips of equal length for the sides; and (
Elementary lessons on insects . elementarylesson00need Year: 1928 PRESERVING 197 3. Cut and fit sods in flower pots for a few of the live cages shown on page 200. 4. A single caddisworm net-spinning trough will be needed. The making of it is a small job for the manual training shop.* F ig. 70.—A trough for net spinning caddis worms, in which 'made to order' food-catching nets are easily obtained. * The materials needed are: (a) a piece of wire cloth 2' x 3'; (&) two pieces of flooring or other stuff, grooved on one edge and two feet long; (c) two strips of equal length for the sides; and (d) a short cross strip for the intake end. Make it as follows: Nail the two grooved strips together to form the bottom. Saw a cross-groove near one end to receive the screen. Place the screen in this groove, bending the ends flat against the sides of the bottom pieces. Nail on the two side pieces so that they will stand an inch higher than the bottom. Nail the short strip across the intake end (the end opposite the screen), in position, projecting both above and ]below the trough; below, far enough to give a slant to the trough of about an inch per running foot. If the bottom be painted black inside and dried before use, the nets made in this trough will show up better.
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