A gravity survey was conducted over the Garber field in 1939 to ascertain if a gravity anomaly was associated with the Garber structure. Gravity station spacing was 805 m (2640 ft) on a 1609 m (1 mile) grid. I was party chief of the gravity survey which was terminated, prior to completion, because a gravity anomaly was not recognized by the client company. I was not satisfied with this decision and returned to the Garber field in 1950, to conduct an experiment to determine if closer station spacing would disclose a gravity anomaly over the Garber structure. I used gravity station spacing of 201 m (660 ft) on a 402 m (1320 ft) grid. This gravity station spacing was considered a microgravity survey in 1950.

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