. Contributions from the Bermuda Biological Station for Research. Biology -- Research. 262 HOVEY JORDAN sities. These were placed within a small wooden reflector-box which had a small hole in one end. The box was lined with tin for the pur- pose of increasing the intensity of the illumination. It is to be re- gretted that no means was available for testing the exact intensity of the light;3 but for the study of variations in the sensitivity in different regions of the integument and of photodynamic responses, relative in- tensities, such as are obtained from wattages of various magnitudes, are
. Contributions from the Bermuda Biological Station for Research. Biology -- Research. 262 HOVEY JORDAN sities. These were placed within a small wooden reflector-box which had a small hole in one end. The box was lined with tin for the pur- pose of increasing the intensity of the illumination. It is to be re- gretted that no means was available for testing the exact intensity of the light;3 but for the study of variations in the sensitivity in different regions of the integument and of photodynamic responses, relative in- tensities, such as are obtained from wattages of various magnitudes, are sufficiently precise. The illumination of the fish, however, was less intense than the indicated wattage of the lamp, because a certain. Figure of the aquarium used in testing fishes for photosensitivity amount of light was cut off by the edges of the reflector-box and by the water4 between the fish and the light. These experiments were conducted in an aquarium which has already been figured and described elsewhere (Jordan '17); the figure is repro- 3 The candle power of mazda electric light bulbs is approximately 1 per watt; but, as the candle power was not measured in the following experiments, wattages instead of candle powers will be used to express the intensity of illumination. 4 Temperature changes are negligible, since a thermometer held in the position occupied by the fish was unaffected by the light. There was usually about 6 to 8 inches of water between the light, which was held against the glass of the aqua- rium, and the 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 Bermuda Biological Station for Research. Cambridge, Mass. : [s. n. ]
Size: 1769px × 1412px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiod, bookdecade1910, bookyear1917
