Early six-spindle integrating stage for the microscope by E. Leitz, ca. 1930

Early six-spindle integrating stage for the microscope by E. Leitz, ca. 1930

Stock Number: FG_21003

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An early 20th century accessory for the microscope intended to count the proportional amounts of six different components in sediments and rocks in one operation by means of 6 independent measuring spindles

Dimensions

Case: 25 x 21.5 x 10 cm, weight: 3.09 kg.

Circa

1930-1935

Country of manufacture

Germany

Categories: Scientific, Calculating, Microscopy, Mineralogy & Gemmology, Natural history, Physics & Chemistry, Scales Weights & Measures

Description

Offered here is an early six-spindle integrating stage by Ernst Leitz, Wetzlar (Germany), S.N. 584 (early to mid 1930s), designed for planimetric / petrofabric analysis of rocks in thin section or grain collections of sediments. This device is mounted on the stage of the petrographic microscope (see example in the last photo), allows cumulative tabulation of up to six minerals in the traversed area. Percent totals for each mineral can be calculated, and consequently, the rock type can be determined.

These early devices were replaced during the later years of the 1930s by more advanced integrating stages, and from the mid-20th century by point or area counters. Today, image analyzers and computers perform this task automatically.

References:

E. Leitz, Inc., Leitz Polarising Microscopes and Accessories (New York: E. Leitz, Inc., 1936), 81-82.

Kile, D.E. 2003. The Petrographic Microscope, Evolution of a Mineralogical Research Instrument (The Mineralogical Record Special Publication No. 1), P. 66 Fig. 83. Tuscon, AR.

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IL Gilgamesh

Gilgamesh was the mythological hero of the cultures of ancient West Asia, who set out on a journey in which he sought youth and eternal life.
Fleaglass Gilgamesh is located in Israel. As an archaeologist researching the material culture of the distant past and using the microscope as a major research tool, for more than two decades I have collected microscopes from the first 300 years of existence of this amazing tool and researched the cultural context of their use. Passion has become an obsession and I cultivate the full and almost unique West Asian collection of historical microscopes. Respectively, I put up for sale surplus or interesting items from the collection. I would be happy to advise any interested collector free of charge. Needless to say, I would love to send photos, information and bibliographic references, and discuss the sale details of the items offered here for sale.

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