Practical bacteriology for chemical students / by David Ellis.

  • David Ellis
Date:
1923
Catalogue details

Licence: In copyright

Credit: Practical bacteriology for chemical students / by David Ellis. Source: Wellcome Collection.

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    3. Weigh the apparatus, then set aside at a temperature of 20 0 C. 4. Weigh from time to time and draw a curve showing the loss of CO., after each fixed interval of time. Exercise 102. The preservation of Yeasts. 1. Prepare the following medium Cane sugar 100 c.c. of 10 per cent, solution, Sulphuric acid ’i gram. 2. Sterilise. Yeasts may be preserved for years in this medium. Care must be taken that the preserving bottle is carefully stoppered up. Hansen’s flask (Fig. 9 e) serves the purpose very well. The outlets are carefully plugged first with cotton-wool and then with sealing* wax over the cotton-wool.