. Experiments with plants. Botany. TEE A WAKENING OF THE SEED 49 seed is about half submerged, it will soon begin to swell and force the free arm to move, thus stretching the spring and causing the indicator of the balance to move also. If a small piece of glass be smeared with vaseline and placed in front of the indicator, it will move forward with it and record the highest pressure reached. We may now set the balance at any desired pressure by lengthening or shortening one. 38. Arrangement for testing the swelling power of a single seed. of the wire loops, or by turning the nut, or by both m
. Experiments with plants. Botany. TEE A WAKENING OF THE SEED 49 seed is about half submerged, it will soon begin to swell and force the free arm to move, thus stretching the spring and causing the indicator of the balance to move also. If a small piece of glass be smeared with vaseline and placed in front of the indicator, it will move forward with it and record the highest pressure reached. We may now set the balance at any desired pressure by lengthening or shortening one. 38. Arrangement for testing the swelling power of a single seed. of the wire loops, or by turning the nut, or by both methods, and leave it for forty-eight hours. If at the end of that time an increase of pressure has been registered, we may replace the seed by a similar one of about the same size, taking care to set the balance at the outset at a somewhat smaller pressure than the highest recorded in the experiment just finished. The experiment should be watched and the pressure recorded from time to time. It must be remembered. 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 Osterhout, Winthrop John Van Leuven, 1871-. New York, The Macmillan company; London, Macmillan & co. , ltd.
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisher, booksubjectbotany
