Description of an apparatus for maintaining a constant temperature under the microscope / by E.A. Schäfer.

  • Sharpey-Schäfer, E. A. (Edward Albert), Sir, 1850-1935.
Date:
[between 1880 and 1889?]
Catalogue details

Licence: Public Domain Mark

Credit: Description of an apparatus for maintaining a constant temperature under the microscope / by E.A. Schäfer. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    inflow tube of the primary circuit, the other with the descendiug or outflow tube. The reader will have noticed that the method by which the circulation is maintained in the apparatus here described is precisely the same as that employed in the hot-water apparatus now so extensively used for warming houses and conservatories; moreover, the principle of gas regulation is familiar to every laboratory student, and the screw regulator below is a modification of a contrivance used in some forms of barometer for altering the level of the mercury. Nothing, therefore, is claimed on the score of novelty, at the same time it is hoped that this adaptation of ordinary means to microscopical ends may prove of some service to the histologist.1 1 The author regrets that the figures have been executed on too small a scale. The following are some of the actual measurements (in inches and fractions of an inch) of the different parts of the apparatus : Stage.—3f X 1^ X inch; diameter of central chamber of stage f inch; diameter of inlet and outlet tubes inch; diameter of tube for thermometer f inch. Reservoir.—Height 2 inches; outside diameter If inch; diameter of cavity for gas-regulator 1 inch; stand for reservoir (containing pin-hole gas burner) about 2f inches high. The stand may be of the same diameter as the reservoir, but, for the sake of stability, should have a broad,, heavy foot. Gas-regulator.—Bulb If x £ inch; lumen of tube about ^ inch; length of tube 3 or 4 inches; thickness of side-screw about f inch.