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September 7, 1929


JAMA. 1929;93(10):786. doi:10.1001/jama.1929.02710100048029

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Growth of Population in Germany  The excess of births over deaths in Germany, in 1928, according to the provisional report issued by the federal bureau of statistics, was 442,889, or 7.0 per thousand of population, an increase of 38,190 over the excess for 1927, which was 404,699, or 6.4 per thousand inhabitants. However, from the excess of 442,889 must be deducted the tranoceanic emigration amounting to 56,586, which leaves a net increase in population of 386,303. The population of the German reich, exclusive of the Saar region, on Dec. 31, 1928, was therefore 63,811,000, as compared with 63,424,000 at the beginning of the year. Including the Saar region, the total population of the reich, at the close of 1928, may be estimated at 64,600,000.

The Significance of Grenz, or Borderline, Rays  The rays with the longest wavelengths, located at the end of the roentgen spectrum, have been studied carefully in

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