I recently purchased a Phelps-Gurley vernier compass. Unfortunately it does not have the box. If anyone has one that I could get pictures and measurments of, I...
Evan, If you cannot get your hands on a photo of a "Phelps-Gurley" compass box. Try looking for a box for a Gurley Compass as they are quite similar. Tim ... ...
Sorry I answered before looking at your photos. It is clear from the three objects in the photo that the middle position is as I guessed for a crosshair. Note...
It is unlikely that the middle position is for a field lens, though such an arrangement is possible and produces an erect image. The eyepiece would have to be...
... Thank you very much...that makes perfect sense. So, I'll add some crosshairs, but I guess I'm stuck with using an alidade that produces inverted...
... and have ... http://www.wscottsmith.com/scott/alidade.htm ... telescope, ... Galilean ... go, but ... missing, ... it make ... 20Smith\Application%20Data ...
Another wrinkle/helpful bit of information... I just discovered that a second insert exists inside the tube. I've now uploaded a photo of all four pieces to: ...
Scott, As previously claimed, the first insert is indeed for crosshairs, and teh second insert is an adjustable aperature. It was very common for alidades to...
Horsehair will not work it is too big and will look like cable once magnified. As early books state to replace a crosshair, "take one large brown spider...."....
Howdy folks, I am a newbie at surveying and just bought a Berger CST 54-135 Level for doing some grade elevation work on my property. Where can I find some...
Could you resend the last link? What I received does not work. Thanks George ... 20Groups/Agriculture ... information? ... Level ... dissemination of ... is ...
Im Gregory, you can call me Greg if you like :) Thanks for letting me be part of your nice email list. Surveying is fun and interesting, but the old equipment ...
Looking for a useable reproduction sextant of the type used in the 1800's. Would someone recommend a good source? I'm willing to pay a fair price for one that...
Hi Dan Try Ebay, I got quite a good one for a reasonable price. You might have to wait a while till one comes along...but it is worth it! Paul ... From:...
PAUL WANGENSTEIN
timberwyck76@...
Apr 3, 2007 8:40 pm
215
Dan, I just got off the phone with Don Erickson, who will be one of our instructors, and I asked him the same thing. He recommends the plastic ones for what we...
I will probably bring the Mark III sextant. Sounds like the repro's are not highly thought of for being useable. Just thought it would be more "authentic" to...
I'm very active with the Society for Creative Anachronism, a medieval re-creation group. I'm also an RCE & LS and want to research any information on...
... Try Apian's Instrumentbuch. This was printed in 1533 and deals with (survey) instruments and techniques from that era. It is available on-line, but without...
... to ... than ... Kon, I have used O-1 oil hardening steel for all the needles I have made thus far. I prefer a needle with some thickness 1/16" - 3/32" and...
... I have nothing to offer except that I tried the old magnet, sewing needle & cork compass floating in a bowl of water with a Cub Scout group one evening and...
