Nachet medium petrographic compound microscope
Date1880-1890
Inventory Number1206
ClassificationMicroscope
Subject
Maker
A. Nachet
1880 - 1890
Cultural Region
Place of Origin
Dimensions36.2 × 10 × 13.5 cm (14 1/4 × 3 15/16 × 5 5/16 in.)
Material
AccessoriesOcular with crosshair; cap for ocular with analyzer; ocular cap; objective #3 with 11.5 x 045 mm threads; substage polarizer; no case.
DescriptionThis is a smaller and simpler Nachet polarizing microscope that CHSI inv. 1202, but of a similar design principle. This has a rotary stage with a vernier. The analyser is on top of the ocular. The objective has the French standard thread.
The ocular and the upper part of the tube are fixed while the objective has separate rack and pinion focusing. The objective rotates together with the graduated rotary stage. The polarizer, analyzer and the ocular do not rotate with respect to the stand. The specimen and objective thus keep their angular alignment while the plane of polarization is rotated.
The ocular and the upper part of the tube are fixed while the objective has separate rack and pinion focusing. The objective rotates together with the graduated rotary stage. The polarizer, analyzer and the ocular do not rotate with respect to the stand. The specimen and objective thus keep their angular alignment while the plane of polarization is rotated.
Signedon heel: NACHET / 17 rue St. Séverin, Paris
ProvenancePredecessor to the Department of Mineralogy and Petrography (est. 1894), Harvard University, from the 1880s onward; transfer to CHSI in 1969 courtesy of Professor Clifford Frondel.
A. Nachet
Date: circa 1885
Accessories: Fixed (?) ocular with crosshairs; flip analyzer in tube; standard 11.5 x 0.45 mm objective No. 5 , but in sliding mount; substage polarizer; no case.
Object number: 1202
A. Nachet
Date: 1880-1890
Accessories: 3 Objectives: #7 Nachet with adjustment collar and Society thread in cannister (1107c), small box with # 3 and 6 (11.5 mm threads) and adapter to Society threads (1107b); 2 oculars: no # and 2; bull's eye condenser; pill box with with cover glasses; flat case (1107d) with key.
Object number: 1107a
Nachet et Fils (I)
Date: 1872-1880
Accessories: Objective #1 with 11.5 mm threads; adapter to Society threads; ocular #3; condensor with iris; dual substage mirror on jointed arm; no case.
Object number: 1306
Ernst Leitz (company)
Date: circa 1919
Accessories: oculars (2): 3, 8x; accessory box; Leitz objectives (5); wrenches (2); ground glass; N.A. 1.45 condensor cap; Abbe condensor; rotary stage; case
Object number: 1345
Nachet et Fils (I)
Date: 1862-1880
Accessories: 5 objectives (11.5 mm) in leather-covered box (1025b): 1, 3, 5, 5, 7 immersion; 4 oculars: 1, 2, 3, no #; bull's eye on articulated stand (1025d); mahogany parts box (1025c with dissecting instruments: 6 needles, 2 scalpels, scissors, tweezers, 4 slides, box of cover glasses, 2 cup diaphragms, 1 diffuser ; flat case with fine lock, no key.
Object number: 1025a
A. Nachet
Date: 1872-1880
Accessories: One objective # 1 with 11.5 x 0.45 mm thread; 2 (different) oculars marked corresponding to the left and right tubes B and A; microscope camera lu[1998-1-0590]; case of accessories (1147b-d)
Object number: 1147a
Camille Sébastien Nachet
Date: 1855-1865
Accessories: oculars (3); objectives (2 large with 13 mm thread): 4, 8 with screw canisters for the same; objectives (3 with ~6.4 mm threads); nosepieces (3); parts box; flat mahogany case; no key.
Object number: 1108
Nachet et Fils (I)
Date: 1862
Accessories: 3 Oculars: 1, 2, 3; 3 Objectives in fitted box:1, 2, 3; one on tube: also #5, but longer; Camera lucida "Nachet"; 9 Glass slides; Cover glasses; bull's eye on jointed arm; wheel with 2 stops under stage; small blue filter; flat case with key.
Object number: 1069
Nachet et Fils (I)
Date: 1862
Accessories: 3 Oculars: 1, 2, 3; 3 Objectives in fitted box:1, 2, 3; one on tube: also #5, but longer; Camera lucida "Nachet"; 9 Glass slides; Cover glasses; bull's eye on jointed arm; wheel with 2 stops under stage; small blue filter; flat case with key.
Object number: 1069a
Nachet et Fils (I)
Date: circa 1872
Accessories: Box covered by blue paper (1990-2-0012c), marked "mementoes"and containing 4 slides; adapter from Society thread to dual nosepiece (19901-2-0012b) with 11.4 mm threads; 2 objectives : #2 and #7 immersion. No case.
Object number: 1990-2-0012a
Nachet et Fils (I)
Date: 1862-1872
Accessories: 3 Objectives; 2 oculars; substage mirror with mounting screw lost; 1 prepared slide
Object number: 1030
Camille Sébastien Nachet
Date: 1856-1862
Accessories: oculars (2): 2 , 3; objectives (6) in fitted box (1029b): 0, 1, 2, 3, 5, 7, along with substage condenser and oblique Nachet prism condenser; cup diaphram; flat case with parts box (1029c) holding diffuser, camera lucida; stage micrometer; ocular micrometer; wet specimen trough, 4 slides in red leather box (1029d); bull's eye condenser.
Object number: 1029a