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CALDWELL BOXFINDER COMPASS DIP NEEDLE LAND SURVEYING
Scientific and Medical:
Pre 1960 stock# ST2055
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click for details
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Al's Past Treasures
(561) 734-2865
$50.00
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Here is an unusual, not often seen item. The vintage surveying tool reads "Caldwell Boxfinder Made in USA Geo A Caldwell Co. Boston Mass, Hold vertical with needle in north and south line move steadily near surface over the suspected area". Checking through Google I found this info. about this item: Another name for the boxfinder is "dip needle" since it gives an indication of the angle at which the earth's magnetic field "lines of force" intersect the horizonta ...click for details
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