WebSectors A French, brass sector dating from the eighteenth century. It has scales for line of equal parts, polygons, line of chords, metals, weights of shot and gun calibre. Unlike … WebMar 9, 2024 · 17th CENTURY BRASS FOLDING RULER RULE – DEMI PIED DE ROY - BUTTERFIELD O. ... Paris. Antique Golden Massive Brass Sector Signed Butterfield Pre Slide Rule C. #10; Lot Of 14 Christies/ Sotheby Butterfield's Cat.18th Century Decorat. AN EXQUISITE BRASS "Butterfield-type" SUNDIAL C.1710-30. Antique Butterfield Brass …
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WebJun 6, 2024 · Brass is an alloy of copper and zinc, and can have many different properties depending on the balance of these two materials. Additionally, brass can include other metals such as aluminum, lead, and arsenic, which will each create a different alloy with its own unique properties. WebMar 27, 2024 · Brass wire demand in Latin America is mostly driven by end-use sectors including construction, automotive, and transportation. Due to its usage in springs, fasteners, and other items that require corrosion resistance, the alpha brass type segment has the biggest market in this area. root object python
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WebEarly 6" brass sector, made by Michael Butterfield, ca 1700. 396 Electrical Slide Rule, "Elektro", Model 1/98, made by Faber-Castell. 397 Duplex log log, Multilog Slide Rule, made by Aristo. 398 Ivory 6" 4 fold rule, … WebThe two arms on this brass hinged sector have decorative curves at one end. An acanthus scroll motif is on the hinge. Five double scales (i.e., the scales on one arm are identical … WebA brass sector (length closed 5.1 in., open 9.4 in.) features two logarithmically scaled arms joined at a pivotal hinge. Although no numbers are present, recessed dots or needle holes in sets of two, three, or four bracket some of the line spaces. root of .net type hierarchy