. Adventures with animals and plants. Biology. PROBLEM I. The Co7nposition of Living Things 113 Fig. 146 The lenses below the stage are not usually at- tached to high school micro- scopes. When you look through the microscope you 7ise two sets of lenses. Each set consists of two or more separate lenses. Can you find the sets? This jnicroscope is cut through the middle. (BAUSCH & LOMB OPTICAL CO.). >- 11. In review state briefly what you have learned in this problem about: {a) Cells, explaining the diflferences between plant and animal cells. (b) Protoplasm, its characteristics and the e
. Adventures with animals and plants. Biology. PROBLEM I. The Co7nposition of Living Things 113 Fig. 146 The lenses below the stage are not usually at- tached to high school micro- scopes. When you look through the microscope you 7ise two sets of lenses. Each set consists of two or more separate lenses. Can you find the sets? This jnicroscope is cut through the middle. (BAUSCH & LOMB OPTICAL CO.). >- 11. In review state briefly what you have learned in this problem about: {a) Cells, explaining the diflferences between plant and animal cells. (b) Protoplasm, its characteristics and the elements of which it is composed, {c) The compounds which are mixed together in living matter, {d) Why plants and animals are said to be fundamentally alike. Exercises 1. If you will have an opportunity to use a school microscope you should be familiar with its parts. Starting at the bottom they are: base; mirror; diaphragm (attached to the bottom of the stage); stage (which holds the glass slide); arm (the part by which you carry the microscope); barrel (the thick vertical tube); 7wsepiece (revolving part at the bottom of the barrel); objectives (two or more lenses screwed into the nosepiece); coarse adjiistDiem (two large wheels on either side of the barrel); fine adjiistviejU (two smaller wheels); ocidar or eyepiece (the lens fitted into the top of the barrel).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Kroeber, Elsbeth, 1882-; Wolff, Walter Harold, 1901-. Boston : D. C. Heath
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