Dating keuffel drafting tools
The transits main scope is 9" long which would make this a light mountain size transit.It has an image erect and the optics are crisp and clear. The silvered vertical circle is 4" and has an aux Stadia scale as shown. Even the leather strap is original and stamped with the serial # 28294.Saegmuller Solar Attachments were a top mounted scope. 50.00 Order Now This Buff & Buff solar transit is in exceptional condition. Magnetic deviations would adversely affect magnetic compasses and so were not an accurate means to determine ones location in many areas.(see below) The Smith Patent Solar Attachment and the Pearson Solar Attachment mounted on the side of the instrument and both are more unusual. From the serial #6625 we can surmise this transit was manufactured shortly after the turn of the century. Co was formed after the breakup of the Buff and Berger company back near the turn of the century. The instrument has a near perfect lacquered finish on the brass portions. The idea was to use the position of the sun and the horizon to determine ones location, much as a sextant or octant would be used to determine ones true location on a boat in open water with no visible reference points.The Burt solar attachment was used on Gurley, Roach and other instruments.K & E, Buff, Warren Knight, Fauth and others used the Saegmuller patent attachment. Solar transits were developed so that the user could accurately determine his location in the field without relying on the magnetic compass.The first patent for a solar transit was granted to Burt in the 1830's but many other variants were developed and patented afterward.
From the serial #28294 we can surmise this solar transit was manufactured in the 1920's - 1930's. Co was formed after the breakup of the Buff and Berger company back near the turn of the century.George Washington (1732-1799) studied surveying from Love's Geodaesia which was widely used in America." I found another write-up for this book with more history and detail at this link a surveying outfit, Burnt Chimney, from North Carolina. Click for Pic Click for Pic Click for Pic Click for Pic Click for Pic Click for Pic Click for Pic Click for Pic Click for Pic Click for Pic Click for Pic Click for Pic Click for Pic DKDK-GE-BK Good . There is one of those Spanish dip Compasses pictured and described in my past sales archives on The address for that page is version looks more like a water dowser in design with its twin handles. A Google search for that turns up several examples and the following info taken from the Smithsonian site. If you have similar antiques or collectibles you want to sell please see our FAQ Page, the Appraisal / Selling Page, and the Selling Your Collection Pages for further info about selling with us.From reading this it seems that this was the first edition published for use here in the US or New World. The power tube is filled with a special gold looking material that enhances its abilities. The small turnip bob on the right is marked Marples & Sons Sheffield. Georg Butenschn was the proprietor of a workshop for scientific instruments located in Bahrenfeld, near Hamburg, and he showed his wares at the international exhibitions held in Chicago (1893), Berlin (1896), and Paris (1900). The empty spot in the box held a base or knuckle joint. To view examples of the types of antiques and collectibles we have previously sold and are always interested in helping you sell please visit our Past Sales Archive Pages at our sister website The original Buff marked fixed leg tripod is included in the price.
Solar transits were developed so that the user could accurately determine his location in the field without relying on the magnetic compass.Later editions of the book appeared for over a century with the 12th (1793) and 13th (1796) editions being published in New York.