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Signed Zentmayer Microscope
Signed Zentmayer Microscope with no case or accessories other than what are shown in images. The microscope is signed “J. Zentmayer Phila.Pat’d Aug.15.76”
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16 Inches Terrestrial Library Floor Globe Signed Cram 1930
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16-inches diameter; 40 inches total height. On mahogany four-legged Duncan Phyfe style stand. Globe and horizon A handsome full-sized floor globe on a traditional Duncan Phfye style stand. Ocean currents are indicated with yellow directional arrows. A reference key indicates the map scales and the symbols for warm and cold ocean currents.
There is a figure-eight analemma in the Pacific Ocean. Manchuria is shown as “Manchoukuo,” as it was known after the Japanese invaded the area and established a puppet state from Read More...
Good Replica Laennec Stethoscope by Wyeth Laboratories c 1959
A good Laennec stethoscope replica made as a promotional artefact by Wyeth Laboratories-in original card case and wood stand with Leaflet by Fred Rogers M. D.-‘Laennec Founder of Modern Clinical Medicine’
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Brunton Standard Transit Compass
As seen, no issues
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Civil War Era Tiemann Probe and Director Set
A nicely cased and labeled Tiemann Civil War era probe and director set. Length of case: 5″ or 12.5cm.
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Gurley Solar Telescope Compass – One of Two Known
This is the only privately-owned Gurley Solar Telescope Compass (STC) known. For the reasons discussed below, the STC offered here should be a Top of The Bucket List item, and it is very unlikely that you will ever see another one offered for sale.
Rarity
Gurley apparently did not sell many STCs. Gurley started offering STCs for sale in its 1858 Catalogue, sold very few instruments of any kind during the Civil War Years (1861 to 1865), and then stopped selling Read More...
Wonderful Circa 1854 Burt & Bailey Solar Compass – Yosemite
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This is a really neat Circa 1854 Burt & Bailey Solar Compass that was almost certainly used to survey Yosemite National Park and San Francisco’s Hatch Hetchy Reservoir.
The Canvas bag is AMAZING – stenciled on top of the bag is U.S.D.S. Y.N.P. (United States Deputy Surveyor Yosemite National Park). Can you imagine the pride that Drenzy Jones, the U.S. Deputy Surveyor and owner of the Solar Compass, must have felted when he stenciled that on top of the canvas Read More...
Beautiful 1802 Hurtin Minute Compass
Offered here is a magnificent 1802 Christian Hurtin Minute Compass (#28) – a true work of art.
The 1837 painting shows Henry Houston with a Hurtin Minute Compass. It’s probably not the Hurtin Minute Compass I’m offering here, but the compass and the painting are both simply fantastic (the painting is NOT included in my offering).
My Hurtin Minute Compass is both Gorgeous and Sophisticated. Hurtin was a master engraver, and his compasses exhibit a unique look that demonstrate Hurtin’s exceptional Read More...
Fascinating Circa 1900 K&E Transit Expertly Modified By U.S. Military
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Here is a really interesting instrument.
This instrument started its life as a K&E Transit with serial number 3426, and was likely made in the late 1890s.
I suspect the U.S. Military purchased this transit when new and transferred the transit to Frankford Arsenal, which was the Military’s R&D center back in the day. Frankford Arsenal swapped out the K&E standards and telescope and installed a Frankford Arsenal Panoramic Sight. The sight used the military’s system of mills (6400 mills Read More...
Nineteenth Century American Oven Thermometer
An oven thermometer by Cooper of Pequabuck Connecticut-First Patented 1885,enamelled dial in good condition
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Wonderful Late 1830’s Ewin Compass With a Chandlee L-T Table
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Offered here is a very interesting late 1830s Ewin compass that has seen very little field use. What makes this compass so interesting is the internal chain counter (inside the compass box) and the L – T table on the South arm of the compass mainplate. Goldsmith Chandlee and his successor (George Graves) are the only makers to use internal chain counters and L – T Tables. (An L – T Table converts links from a 25 link 33 Read More...
Colonial Semi-Circumferentor With Engraved Trough Compass
This colonial era unsigned Semi-Circumferentor is one of the more common varieties – trough compass, brass semi-circle, brass alidade and sight vanes, and a wood block. The engraved compass card is another story, however. Wow. Semi-Circumferentors made largely out of wood were supposed to be a fairly cheap way for a surveyor to buy an instrument that could measure independently of the needle. So why would an affordable instrument have such a wonderfully engraved compass card???
I came across Read More...