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- | ---Bose experimented with heat and cold to ascertain the optimal condi- | + | --- One day Bose found |
- | tions under which plant movement was best elicited. | + | |
that when all motion stopped in his plant, it suddenly shuddered in a | that when all motion stopped in his plant, it suddenly shuddered in a | ||
way reminiscent of the death spasm in animals. To determine exactly | way reminiscent of the death spasm in animals. To determine exactly | ||
the critical temperature at which death occurred, he invented a **moro- | the critical temperature at which death occurred, he invented a **moro- | ||
graph, or death recorder.** While many plants met their end at sixty | graph, or death recorder.** While many plants met their end at sixty | ||
- | degrees | + | degrees |
their previous histories and ages. If their power of resistance was artificially depressed by fatigue, or poison, the death spasm would take place | their previous histories and ages. If their power of resistance was artificially depressed by fatigue, or poison, the death spasm would take place | ||
with temperatures as low as twenty-three degrees Centigrade. At death, | with temperatures as low as twenty-three degrees Centigrade. At death, | ||
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volumes in 1906 and 1907. Pg 94 | volumes in 1906 and 1907. Pg 94 | ||
- | Bose devise a brand-new instrument, | + | Boses invention |
- | tion not only produced a ten-thousand-fold magnification of movement, | + | |
far beyond the powers of the strongest microscope, but could automati- | far beyond the powers of the strongest microscope, but could automati- | ||
cally record the rate of growth of plants and their changes in a period | cally record the rate of growth of plants and their changes in a period | ||
as short as a minute. | as short as a minute. | ||
- | With this instrument | + | Bose showed the remarkable fact that in countless |
- | less plants, **growth proceeds in rhythmic pulses.** each pulse exhibiting' | + | |
rapid uplift and then a slower partial recoil of about a fourth the distance | rapid uplift and then a slower partial recoil of about a fourth the distance | ||
gained. The pulses in Calcutta averaged about three per minute. By | gained. The pulses in Calcutta averaged about three per minute. By | ||
- | watching the progress of the movement on the chart of his new inven- | + | watching the progress of the movement on the chart Bose found that **growth in some plants could be retarded and even |
- | tion, Bose found that growth in some plants could be retarded and to be five feet. | + | |
halted by merely touching them, and that in others rough handling | halted by merely touching them, and that in others rough handling | ||
- | stimulated growth, especially if they were sluggish and morose. Pg 99 | + | stimulated growth, especially if they were sluggish and morose.** Pg 99 |
---The roots of plants are called " | ---The roots of plants are called " | ||
the soil. Leaves turn to light because they are " | the soil. Leaves turn to light because they are " | ||
bending against the flow of a stream " | bending against the flow of a stream " | ||
- | is known as its " | + | is known as its " |
---Bose now in retirement summud his scientific philosophy: | ---Bose now in retirement summud his scientific philosophy: | ||
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abandon all our preconceptions, | abandon all our preconceptions, | ||
absolutely groundless and contrary to facts. The final appeal must be | absolutely groundless and contrary to facts. The final appeal must be | ||
- | made to the plant itself and no evidence should be accepted unless it bears | + | made to the plant itself and no evidence should be accepted unless |
- | the plant' | + | the plant' |