[Report 1908] / Medical Officer of Health, Bournemouth County Borough.

  • Bournemouth (England). County Borough Council. nb2004301338.
Date:
1908
Catalogue details

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: [Report 1908] / Medical Officer of Health, Bournemouth County Borough. Source: Wellcome Collection.

    82/90 (page 82)
    respectively with Sulpluite Powder ciiul with a purer form of Superphosphate; as well as 3 samples of Superphos- l)hate of varying quality. I'he three ])owde)’s (Superphosphate) gave me the following results on analysis :— 1 2 8 percent, percent, percent. Calcium Sulphate 88-5 15’8 11*4 Samples of Baking Powder were made from these and used for making special loaves wiiich w^ere baked under exactly similar conditions, each loaf being subse- quently tested for Sulphate of Calcium, as were also the two loaves received fi'om tin' wiiolesale linn, the results were as under :— Crystalline Calcium Sodium Sulphate. Sulphate. Wholesaler’s loaf No. 1 ()-27 p.c. 0 0 p.c. = grains in 2]b. loaf .... 88 84 Wholesaler’s loaf No. 2 0-15 ]).c. 0-24 ]).c. = grains in 21b. loaf .... 21 88 i Own loaf from Pow’der 1 0-11 p.c. 0-89 ]).c. = grains in 21b. loaf 151 55 (')wn loaf from Powder 2 0-004 p.c. 0-28 juc. == grains in 21b. loaf 0 82 Own loaf from Powuler 8 0-088 p.c. 0-12 ]).c. = grains in 21b. loaf .... 12 17 These results show^ that by the process of baking a certain proportion (varying from about 30 per cent, to 00 per cent.) of the Sulphate of Calcium was converted into sodium sulphate and calcium carbonate, but that in no case w^as the wiiole of the calcium sulphate so con- verted, the average amount changed wais about 50 per cent. Assuming 50 per cent, to be changed into sodium sulphate, bread made from the 5 samples of self-raising flour previously analysed by me would contain, approxi- ately the following proportions in a 21b. loaf;—