Some Photographic Equipment II : Film and Print Development : Notes from the Oesper Collections, No. 58, September/October 2019

Containers of typical photographic developing agents spanning the period 1839-1892.
Containers of typical photographic developing agents spanning the period 1839-1892.

Part II of our series on photographic materials in the Oesper Collections deals with chemicals for photo development, developing tanks for film, and printing frames and developing trays for positive prints.

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Some Photographic Equipment 1: Cameras : Notes from from the Oesper Collections, No. 57, July/August 2019

A circa 1948 Kodak Duaflex Camera with flash attachment made by the Eastman Kodak Company of Rochester, NY.
A circa 1948 Kodak Duaflex Camera with flash
attachment made by the Eastman Kodak Company of Rochester, NY.

Though the Oesper Collections do not explicitly collect photographic equipment, a few interesting items have come our way over the years and will be described in this and the succeeding two installments of museum notes.  Click here for issue no. 57.

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Valence Blocks : Notes from the Oesper Collections, No. 56, May/June 2019

Commercial valence block models for use in the lecture hall based on a peg and hole locking mechanism and interchangeable cardboard labels.
Commercial valence block models for use in the lecture hall based on a peg and hole locking mechanism and interchangeable cardboard labels.

Issue 56 describes an unusual type of chemical model known as a valence block that was once used to teach introductory chemistry and which also appeared in chemistry sets in the period 1940-1960.

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Hans Landolt and the Conservation of Mass : Notes from the Oesper Collections, No. 55, March/April 2019

A highly stippled photo of Landolt’s balance with two of his counterpoised reaction tubes (7) – the one on the left before reaction and the one on the right after reaction.
A highly stippled photo of Landolt’s balance with two of his counterpoised reaction tubes (7) – the one on the left before reaction and the one on the right after reaction.

Issue 55 summarizes, using the resources of the Oesper Collections, the work of the Swiss-German physical chemist, Hans Landolt, on the experimental verification of the law of conservation of mass in chemical reactions. 

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A Complete Qual Lab : Notes from the Oesper Collections, No. 54, January/February 2019

The extraordinary
lab bench, chemicals
and equipment for
performing qualitative
chemical analysis offered for sale in the 1902
catalog of the Viennese
laboratory supply house of Lenoir and Forster.

Issue 54 reviews the various chests of reagents and apparatus sold over the last 250 years to private chemists and students wishing to perform qualitative chemical analysis and as highlighted in our collections of apparatus catalogs and monographs.

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Some Blowpipe Equipment : Notes from the Oesper Collections, No. 52, September/October 2018

A portable Berzelius oil lamp for blowpipe analysis. The additional ring and alcohol lamp could be used to evaporate mineral water samples for analysis.
A portable Berzelius oil lamp for blowpipe analysis. The additional ring and alcohol lamp could be used to evaporate mineral water samples for analysis.

Issue 52 highlights items in the Oesper Collections related to the practice and teaching of blowpipe analysis.

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Named Glassware, Notes from the Oesper Collections, No. 46, September/October 2017

Assorted 19th-century round-bottom wine flasks from the Oesper Collections
Assorted 19th-century round-bottom wine flasks
from the Oesper Collections

Issue 46 explains that common laboratory glassware is often named after famous chemists of the past, though the exact reason for these name choices is not always obvious.

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