Correction: it was President Garfield.
Greg Hodges
On Wednesday, August 28, 2019, 08:58:44 a.m. EDT, Greg Hodges via SEGMIN
<[email protected]> wrote:
Alexander Graham Bell put together an induction-balance based metal detector
(note, Dennis, that it's frequency domain!) in an effort to find the bullet
lodged in President Lincoln. (It was unsuccessful of course. Maybe they
should have used
time-domain).https://circulatingnow.nlm.nih.gov/2013/07/26/the-president-is-somewhat-restless-enter-bell/
A UXO-metal-detector was produced in 1919. Picture attached.
Greg Hodges
On Wednesday, August 28, 2019, 12:34:45 a.m. EDT, Dennis Woods via SEGMIN
<[email protected]> wrote:
And off-time, time domain even back in 1892.
Dennis Woods
Sent from my BlackBerry - the most secure mobile device - via the TELUS
Network
| From: [email protected]: August 27, 2019 7:29 PMTo:
[email protected]: [email protected]:
[email protected]: [SEGMIN] Old geophysical systems |
Dear Colleagues
A colleague (LP) provided the image of the early EM ore mapping system,
reported to be in use in 1892. The other system is likely a bit more recent
(has vacuum tubes so guessing ~1920s), but the operator gets full marks for
having sharp taste in clothing.
Regards/Ken
2019-Condor’s 20th Anniversary
Condor Consulting, Inc
St 150 2201 Kipling St
Lakewood CO 80215 USA
T: 303-423-8475
Condor North Consulting
St 1112 1030 West Georgia St
Vancouver BC V6E 2Y3
T: 604-630-8334
E: [email protected]
C: 303-520-5732
Skype-ken.witherly1
www.condorconsult.com
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