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On a New Apparatus for Counting Bacterial Colonies in Roll-Cultures

Published online by Cambridge University Press:  15 September 2014

J. Buchanan Young
J. Buchanan Young
Affiliation:
Public Health Laboratory, University of Edinburgh
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Extract

The apparatus which I have devised for the counting of bacterial colonies in roll-cultures, consists of a glass tube 15 centimetres long, the surface of which is divided by finely etched lines into square centimetres. The bore of this tube is such that the roll-culture tubes, which are of a uniform diameter, just slide without play within it. The ends of the tube are fitted into brass collars (Al, A2), which have inserted in them india-rubber rings (B1, B2). These india-rubber rings serve to retain the culture tubes in position during the process of counting. One end of the apparatus is adapted for grasping ordinary roll-culture tubes, the other for fixing the thin stems of Roux's tubes for anaerobic cultures.

Type
Proceedings
Information
Proceedings of the Royal Society of Edinburgh , Volume 20 , 1895 , pp. 28 - 29
Copyright
Copyright © Royal Society of Edinburgh 1895

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