compressorium
Date: 1862
Inventory Number: 1157g
Classification: Microscope Accessory
Subject:
Maker: Nachet et Fils (I) (fl. 1862 - 1880)
Owner: Algernon S. Coolidge, Sr. (born 1830)
Owner: Algernon Sidney Coolidge, Jr. (1860 - 1939)
Donor: Edward D. Churchill (1895 - 1972)
Collector: Ernst-Lewis Collection of Microscopes
Cultural Region:
Place of Origin:
Dimensions:
2.7 × 11.4 × 3.3 cm (1 1/16 × 4 1/2 × 1 5/16 in.)
Material:
Description1157 is a fine example of the type of compound microscope that Nachet et Fils called the "grand modèle." For descriptive purposes and better comparison with a similar but not identical, early "grand modèle" by Nachet, the assembly is divided into these components, each with their own images and written details:
1157a: the microscope with eyepieces
1157b: box of objectives and condensers
1157c: microscope case and parts box, with diverse accessories
1157d: box of slides
1157e: bull's eye condenser
1157f: Amici illuminating prism, Nachet-style
1157g: compressorium
1157h: manuscripts found in case
-------------------------------------
1157g is a compressorium. The plate is octagonal and has a darkened surface and bright brass edges. There is a large window in the center of the plate. On one side of the plate there is a bevel around this aperture. On the other side there are two upright posts and a device to flatten down a specimen over the hole. This device has a fork-mounted flat ring of brass. Its arm is attached to a spring. A knurled screw adjusts the pressure.
1157a: the microscope with eyepieces
1157b: box of objectives and condensers
1157c: microscope case and parts box, with diverse accessories
1157d: box of slides
1157e: bull's eye condenser
1157f: Amici illuminating prism, Nachet-style
1157g: compressorium
1157h: manuscripts found in case
-------------------------------------
1157g is a compressorium. The plate is octagonal and has a darkened surface and bright brass edges. There is a large window in the center of the plate. On one side of the plate there is a bevel around this aperture. On the other side there are two upright posts and a device to flatten down a specimen over the hole. This device has a fork-mounted flat ring of brass. Its arm is attached to a spring. A knurled screw adjusts the pressure.
Signedunsigned
FunctionA compressorium is a device to compress or flatten a specimen by means of applying pressure. The compression enables some cellular structures to be better seen.
Historical AttributesFormerly Ernst-Lewis collection no. 157.
Dr. Lewis notes: "From Dr. Edward D. Churchill in 1940. It came to him from the heirs of Dr. Algernon Coolidge, and possibly belonged to his father [Dr. Algernon Coolidge. Senior]. The brass trimmed mahogany box with full equipment was in its leather case. Since this microscope would have been out of date for Dr. Coolidge Jr. (AB 1881; MD 1886; Professor of Laryngology, 1911-1925), it in all probability belonged to his father, Algernon Coolidge, MD 1853, University Lecturer 2nd half 1867-1868, Instructor in Pathological Anatomy, 1865; Lecturer on Tumors, 1868-1869, in connection with which this microscope would have been excellent equipment."
Dr. Lewis notes: "From Dr. Edward D. Churchill in 1940. It came to him from the heirs of Dr. Algernon Coolidge, and possibly belonged to his father [Dr. Algernon Coolidge. Senior]. The brass trimmed mahogany box with full equipment was in its leather case. Since this microscope would have been out of date for Dr. Coolidge Jr. (AB 1881; MD 1886; Professor of Laryngology, 1911-1925), it in all probability belonged to his father, Algernon Coolidge, MD 1853, University Lecturer 2nd half 1867-1868, Instructor in Pathological Anatomy, 1865; Lecturer on Tumors, 1868-1869, in connection with which this microscope would have been excellent equipment."
Primary SourcesMaison Nachet & Fils Fabrique d'Instruments de Micrographie (Paris, 1872), 6, 26.
On Nachet's oblique illuminating prism, and on Nachet's mounting of Amici's illuminating prism, see John Quekett, Practical Treatise on the Use of the Microscope, 2nd ed. (1852), 119-120, 204.
On Nachet's oblique illuminating prism, and on Nachet's mounting of Amici's illuminating prism, see John Quekett, Practical Treatise on the Use of the Microscope, 2nd ed. (1852), 119-120, 204.
ProvenanceDr. Algernon S.Coolidge, Sr, Harvard Medical School; Dr. Algernon S. Coolidge, Jr, Harvard Medical School; Dr. Edward D. Churchill, pre-1940; gift to the Ernst-Lewis Collection, 1940.