Effects of the Rays of Radium on Plants (1908.) - Bookswagon
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Effects of the Rays of Radium on Plants (1908.)

Effects of the Rays of Radium on Plants (1908.)


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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 edition. Excerpt: ...results as they were obtained. The experiment suggests that the degree of activity of the radium is a more important factor than the duration of the exposure. That is, that a slight increase in activity is more effective than a relatively slight increase in the duration of the exposure. If this is so, the facts concerning the effect of varying the length of exposure will be more readily ascertained by exposing for longer periods of time. With this in view the following experiment was made, and the greatest care was exercised in choosing seeds apparently as nearly alike as possible in size and vigor, in distributing the radium salt evenly over the 120 110 100 90 80 70 S 60 s. 50 40 SO so 10 0. 9 10 11 12 13 14 15 Day of month Fig. I8. Effect on the Growth of Zea Mays of Various Durations of Exposure of the Grains, before Planting, to Radio-Tellurium in a Sealed Glass Tube. bottom of the horizontal tube, in having the tube in contact with all the seeds, and at the same region of the seed, and in having the pots in which the exposed seeds were planted, and all other conditions of growth as nearly uniform as possible for all four cultures. Experiment 27 Object: To ascertain the effect of varying lengths of exposure to the rays of radium of the same activity on the germination and growth of Lupinus albus. October 22, 10 A. M. Three sets of six dry seeds each, A, B, and C, were exposed as follows, to the rays from 10 mg. of RaBr2, 1,800,000 activity, in a sealed glass tube: A. 72 hrs. Planted 4 days after the end of the exposure. B. 50 hrs. " 2" " "" "" C. 26 hrs. "21 hours" "" "" D. Control, not exposed. The seeds were then planted without soaking, in separate pots in...


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Product Details
  • ISBN-13: 9781152892569
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 86
  • Spine Width: 5 mm
  • Width: 189 mm
  • ISBN-10: 1152892568
  • Publisher Date: 01 Apr 2013
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 168 gr


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