Worst, Edward F. (Edward Francis), 1866-1949, Barber, Harriette, [from old catalog] joint author, Seymour, Marian, [from old catalog] joint author · Chicago, A. W. Mumford and company · leaf 252
theearth imder the glass which is raised by the strips at leastthree quarters of an inch from the level of the board. Makea frame work of wood that will just cover the glass part andrest upon the square of wood. Cover this frame with blackpaper. While the insects are not being observed keep the… … FIGURE VII. Figure VII. shows an arrangement by which germinationmay be studied to a certain extent without pulling up theplants from day to day. The apparatus is made of % lumber. It is iox6x3. Grooves are cut in the sides and bottominto which pieces of glass are slipped. The space betweenthe…
Manual training · Paper work · Basket making
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