The changes produced by the growth of bacteria in the molecular concentration and electrical conductivity of culture media / by G.N. Stewart.

  • George Neil Stewart
Date:
[1899?]
Catalogue details

Licence: Public Domain Mark

Credit: The changes produced by the growth of bacteria in the molecular concentration and electrical conductivity of culture media / by G.N. Stewart. Source: Wellcome Collection.

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    EXPERIMENT III. A STERILE SOLUTION OF WITTE’S PEPTONE WAS PREPARED. ON APRIL 11, 1898, 6 TUBES WERE INOCULATED WITH BACILLUS SUBTILIS AND 4 TUBES WITH BACILLUS PROTEUS ZENKERI. A. A (5°)X108. 1898. Apr. 5. Sterile peptone solution. .124 13.68 “ 11. Sterile peptone solution further sterilization in sterilizer.) (after steam .101 11.25 “ 11. 1 p. m. Inoculated 6 test-tubes with B. subtilis and 4 with B. proteus Zenkeri. “ 13'. 4 p. m. B. subtilis No. 1. .104 12.12 B. proteus Zenkeri No. 1. .114 11.53 “ 16. B. subtilis No. 2. .121 13.65 B. proteus Zenkeri No. 4. .104 12.27 “ 27. B. subtilis No. 3. .152 16.42 May 15. B. subtilis No. 4. .571 51.57 “ 15. B. proteus Zenkeri No. 3. .134 13.37 “ 15. B. proteus Zenkeri No. 2. .125 12.56 “ 15. B. subtilis No. 5. .231 21.91 “ 15. B. subtilis No. 6. .219 19.03 Apr. 13. B. subtilis No. 1. .104 12.12 “ 16. B. subtilis No. 1. .589 65.57 “ 25. B. subtilis No. 1. 1.267 144.45 May 15. B. subtilis No. 1. 1.482 171.05 “ 15. B. subtilis No. 3. 1.197 142.98 Apr. 13 B. proteus Zenkeri No. 1. .114 11.53 “ 16. B. proteus Zenkeri No. 1. .530 59.97 “ 25. B. proteus Zenkeri No. 1. 1.093 132.86 Asli .0876 grm. Solids 4.3052 grm. in 100 cc. At 35° C. since inoculation. Considerable growth. At 35° C. Less growth. At 35° C. for 3 days; then room temperature since. U U In bath at 40° C. since April 20. |In bath at 40° C. since April 27. At room temperature. At room temperature. Very lit¬ tle growth. At room temperature since inoc¬ ulation. Fair growth. At room temperature since inoc¬ ulation. Fair growth. Now exposed to air and put in bath at 40° C. Ear more growth than in un¬ opened tubes. Exposed to air on April 27. In bath at 40° C. since. Exposed to air after opening and put in bath at 40° C.
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