Elementary lessons on insects . elementarylesson00need Year: 1928 PRESERVING 193 evaporation may be prevented by a momentary immersion of the whole cage in a tank of water now and then. This wetting will take the place of normal rains. 4. Miscellaneous preparations showing habits. 5. Cages and traps for living insects. 6. Samples of insecticides, fumigants and repellants. Equipment for slide mounting and for cage-making. There should be a table set apart for making slide mounts, and permanently equipped with one or more dissecting microscopes, needles, forceps, alcohol, clearer, balsam, cover
Elementary lessons on insects . elementarylesson00need Year: 1928 PRESERVING 193 evaporation may be prevented by a momentary immersion of the whole cage in a tank of water now and then. This wetting will take the place of normal rains. 4. Miscellaneous preparations showing habits. 5. Cages and traps for living insects. 6. Samples of insecticides, fumigants and repellants. Equipment for slide mounting and for cage-making. There should be a table set apart for making slide mounts, and permanently equipped with one or more dissecting microscopes, needles, forceps, alcohol, clearer, balsam, cover glass, slides, covers, slide labels and slide boxes. There should be a bench available for cage making (per- haps in the manual training department), equipped with window-screen wire cloth, tin shears, tinner's folding tongs, hammer and nails.
Size: 1088px × 1838px
Photo credit: © Bookend / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage
