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The seismograph, originally designed to detect earthquakes, is being used in Europe to find the enemy's big guns. A trained observer can distinguish accurately between the disturbance caused by a falling projectile and by gun firing, and can tell the number, position, ami calibre of the guns.

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https://paperspast.natlib.govt.nz/newspapers/AS19170414.2.79

Bibliographic details

Auckland Star, Volume XLVIII, Issue 89, 14 April 1917, Page 13

Word Count
47

Untitled Auckland Star, Volume XLVIII, Issue 89, 14 April 1917, Page 13

Untitled Auckland Star, Volume XLVIII, Issue 89, 14 April 1917, Page 13