Dating bardou telescopes

In the Columbian Centinel newspaper of Boston dated June 6, 1837, appeared an advertisement promoting Daniel B. 141 Washington Street opposite the Old South Meeting-house. According to the Websters Instrument Makers Database, the firm traded under the name D. There are no indications that the firm manufactured any of the instruments sold, although further research would be needed to confirm this.

Most impressive original 4th quarter 19th century British dockyard builder's model of a 4 masted barque identified as the "ORANASIA" on the maker's label.

The rack is inset into the bar and held in place by two screws.

The stage with two stage clips has an opening made with a counter-sink and a disk that holds the aperture wheel fits into this there are notches on the disk and counter-sink to line it all up.

This instrument is signed in script on the tube Made for Widdifield & Cie, Boston.

The incomplete translation of the signature is indicative of its French origin. The microscope is very similar to the Chevalier Universal Microscope, but some details of construction suggest that it was made by a different firm.

The bar that holds the mirror and stage is screwed into this limb with a blued steel screw.

At the rear of the limb is a milled knob engaging a brass washer loosening this knob allows the limb to be freely rotated where it can then be tightened leaving the tube and stage at any desired angle.

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FAQ for information about file content and naming conventions. Follow the "All Files: HTTP" link in the "View the book" box to the left to find XML files that contain more metadata about the original images and the derived formats (OCR results, PDF etc.).The tube incorporates a drawtube to extend its length.The photos show the microscope set up in horizontal, vertical, inverted (chemical), and simple microscope configurations."Catalogue of Musical Instruments" is an article from The Metropolitan Museum of Art Bulletin, Volume 2 . You may also retrieve all of this items metadata in JSON at the following URL: https://archive.org/metadata/jstor-3252520The metadata below describe the original scanning.View more articles from The Metropolitan Museum of Art Bulletin . Follow the "All Files: HTTP" link in the "View the book" box to the left to find XML files that contain more metadata about the original images and the derived formats (OCR results, PDF etc.).The nosepiece that holds the objective, prism, and tube can be removed from the body of the microscope via a bayonet joint that is activated by pressing a spring-loaded saddle-shaped knob on the limb.

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