Psychological Monographs; General and Applied Volume 24

Psychological Monographs; General and Applied Volume 24

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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. 1917 edition. Excerpt: ...17 C. The radio-micrometer 18 D. The bolometer 20 1. Important points in the construction of sen-sitive bolometers 21 a. The kind of material used for the re-ceiving surface 21 b. The area of the receiving surface.... 21 c. The thickness of the strip used as a re ceiver 21 d. The most favorable resistance of bolometer and balancing coils 22 xiii PAGE e. The slide-wire for balancing the resist ance 22 f. The protection of the bolometer from air currents 22 g. The strength of current 23 2. Points in the construction of the auxiliary galvanometer 23 3. Possible sources of difficulty in the use of the bolometer 25 4. The comparative advantages and disadvan tages of the bolometer 25 E. The selenium cell 26 1. Points to be considered in the construction and use of selenium cells 27 a. Method of preparing the selenium.... 27 b. Purity of the selenium 28 c. Material and size of the electrodes... 28 d. Strength of the battery current 29 e. Direction of the battery current 30 f. Duration of the battery current 30 g. Temperature at which cell is operated 30 h. Pressure. 31 i. Moisture 31 j. Age of cell 31 k. The amount of polarization gradually set up in the cell 32 l. Photo-electric currents 32 2. Factors which render it difficult to use the selenium cell for quantitative work either as an ohmic resistance or as a light-measur-ing instrument 32 3. Factors which apply especially to its use as a light-measuring instrument 33 a. The preexposure of the cell 33 b. The time of exposure to the light to be measured 34 c. Wave-length of spectrum light 34 (1) Factors which have been found to influence the selectiveness of response to wave-length for a given cell 35 (a) Intensity 35 PAGE (b) Length of time of ex posure 35 (c) Temperature, humidity and more

Product details

  • Paperback | 172 pages
  • 189 x 246 x 9mm | 318g
  • United States
  • English
  • black & white illustrations
  • 1236908872
  • 9781236908872