Page 48 - Ethel D. Hume - Bešam ili Paster: Izgubljeno poglavlje u istoriji biologije

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BfiGHAIfi P'S BEACON EXPERIMENT 45

X
TABLE I
B^champ's Beacon Experiment.
B^champ prepared solutions of Cane Sugar 16.365 grams in 100 cubic centimetres of
various solvents and polarised each of these solutions several times at varying intervals
obtaining certain variations in the angle of rotation.
16.365 grm. of Cane Rota- Rota- Rota- Rota- Rota- Rota-
Sugar dissolved in tion tion tion tion tion tion
100 c. c. of each of May May May June August Feb.
the following : 16th 17th 20th 15th 20th 3rd Remarks
1854 1854 1854 1854 1854 1855
1. Distilled Water . 23.88° 23.17° 22.85° 22.39° 17.28° 7.80° Moulds ap-
* peared but
did not greatly
increase.
2. 25% solution of 22.32° 22.20° 22.10° 22.14° 22.27° 22.28° **The Solution
Chloride of Zinc . ** began to get
cloudy. Later
there was
found a slight
deposit of Oxy-
Chloride of
Zinc.
3. A solution of 22.34° 22.13° 22.17° 22.25° 22.22° 22.29° No moulds ap-
Calcium Chloride peared.
containing an
amount of Calci-
um Chloride equi-
valent to the 2
Chloride of Zinc.
4. 25% solution of 22.34° 22.15° 22.10° 22.08° 22.14° 22.28° No moulds ap-
Calcium Chloride. peared.
1 Les Microzymas, p. 48.
2
The original is "Solution de chlorure de calcium iquivalente aupoids du chlorure
de zinc". From this it is inferred that the concentration of CaCl was
2
molecularly equivalent, i.e.
molecular weight of GaCl 2 .
25/o X ; 1,C *
molecular weight of ZnCl 2
111.0
n ,
25% X = 2° % -
1^673