. Some quantitative experiments in long-distance radiotelegraphy . ons would indicate, if this expla-nation is true, that the excessive ionization may, especially in BRANT ROCK RECEIVED ON BIRMINGHAM, JULY 1910 1Q-*AMP. 700 600 500 400 300 200 100 I8=69AMP. \=3750 M X DAY obse:rvations ^ NIGHT \ \ \ \\\\\\ \ \\\\\> -0. \ N? > o \ \c ^- - N X - 1^ X i 100 200 300 400 500 600 700 800 900 1000 MILESFig. 6 summer, persist through many nights. The general experienceof wireless telegraphy would indicate that during the colder monthsthe absorption dies out more uniformly at night. The dayabsorp
. Some quantitative experiments in long-distance radiotelegraphy . ons would indicate, if this expla-nation is true, that the excessive ionization may, especially in BRANT ROCK RECEIVED ON BIRMINGHAM, JULY 1910 1Q-*AMP. 700 600 500 400 300 200 100 I8=69AMP. \=3750 M X DAY obse:rvations ^ NIGHT \ \ \ \\\\\\ \ \\\\\> -0. \ N? > o \ \c ^- - N X - 1^ X i 100 200 300 400 500 600 700 800 900 1000 MILESFig. 6 summer, persist through many nights. The general experienceof wireless telegraphy would indicate that during the colder monthsthe absorption dies out more uniformly at night. The dayabsorption appears from the data obtainable to be fairly uniform Austin] Experiments in Long-Distance Radiotelegraphy 333 throughout the year, at least in the portion of the ocean coveredby our observations, although there are undoubtedly variationsat times, as has been already mentioned in regard to the Birming-ham-BrsLnt Rock signals. There are well-authenticated instances 10-6 AMP, 700 SALEM RECEIVED AT BRANT ROCK, JULY, 1910 600 500 400 300 200 100. 100 200 300 400 500 600 700 800 900 1000 MILESFig. 7 when, for a day or two, the absorption seems to nearly disappearin the daytime. A case in point is that of the long-distance daysignals between the Birmingham and Brant Rock on the returnvoyage from Liberia mentioned on page 351. 334 Bulletin of the Bureau of Standards [Voi. 7. no. 3 SUPPLEMENTARY MEASUREMENTS PROPORTIONALITY OF SENDING AND RECEIVING CURRENTS It was thought possible that when the antennas were used withthe highest power, especially at the longer wave lengths, theremight be losses of energy, either by brushing or by leakage overthe insulators, which might destroy the proportionaHty between ICT^AMP. 700 600 500 400 300 SOO 100 SALEM RECEIVED AT BRANT ROCK, JULY, 1910
Size: 1368px × 1826px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidsome73153631911159159unse
