Tropical diseases bulletin . rculosis is well brought out by therecords in groups with and without machine drill work. Those whowork with the drill are exposed to more concentrated dust, get moresilicosis, and have a higher incidence of tuberculosis than the others. There is an interesting note on chest expansion which gives resultsas follows:—In 345 healthy men, average expansion, 3-2in. ; in150 early silicosis cases, 2-4 in. ; in 54 intermediate silicosiscases, 1-9 in. ; in 3 advanced silicosis cases, 1-1 in., and in18 tuberculosis cases, 2-2 in. A valuable record of Von Pirquet tests in min
Tropical diseases bulletin . rculosis is well brought out by therecords in groups with and without machine drill work. Those whowork with the drill are exposed to more concentrated dust, get moresilicosis, and have a higher incidence of tuberculosis than the others. There is an interesting note on chest expansion which gives resultsas follows:—In 345 healthy men, average expansion, 3-2in. ; in150 early silicosis cases, 2-4 in. ; in 54 intermediate silicosiscases, 1-9 in. ; in 3 advanced silicosis cases, 1-1 in., and in18 tuberculosis cases, 2-2 in. A valuable record of Von Pirquet tests in miners and non-minersis also given, of which the main results are as follows :— Von Pirquet Total. - 1. Persons classified as tuberculous 60 .. 55 or 91-7% 2. Miners and ex-miners (Group 1 excluded) 37 .. 21 or 56-7% 3. Contacts with tuberculous per- sons 226 .. 135 or 60-0% 4. No history of exposure to TB ..69 .. 16 or 23-2% Vol. 18. No. 5. Tuberculosis in the Trobics. 383 v,^ i? ;$i^??S o :r^ ;^ In O t^ CO o> hOOO 20O0. woo -Annual Notification of Pulmonary TuberculosisBendigo District, 1905-1919. AA. Total Notifications. CC. Female Notifications. BB. Male ,, MM. Number of Miners employed. Age Groups Age Qroups- :> >0 O 10 ,?,-,. ; I / J 7 1 1 JOO A A. MalesBB. Females
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