[Report of the Medical Officer of Health for Port of London] page 57

City of London 1933

[Report of the Medical Officer of Health for Port of London]

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Date. 1933.	Sample.	Result of Analysis.						Action taken.
Sample No.
1				2	3	4	5
Oct. 24	Water (5) Micro-organisms on Gelatin—							Samples No. 1 to 4 are of good quality. Sample No. 5 is of very poor quality.
	68°F.—3 days		10	26	56	46	182
	Micro-organisms on Agar—
	98°F.—2 days		8	10	30	12	218
	Bacillus Coli		Absent from 100 c.c.				absent from
							80 c.c.
	Coliform organisms			None.		B. Aerogenes type present in 10 c.c., not in 1 c.c.
	Other organisms		Bacillus	Welchii 100 c.c.		absent from
Nov. 6	Water Micro-organisms on Gelatin—						Per c.c.	No action necessary beyond recommendation as to care of hose.
	68°F.—3 days						550
	Micro-organisms on Agar— 98°F.—2 days						155
	Bacillus Coli Absent from						80 c.c.
	Coliform organisms						None.
	Other organisms Bacillus Welchii present in						100 c.c.
	Bacillus Welchii absent in						10 c.c.
(b) Analyst—
Jan. 18	Grape Fruit Pulp	On analysis this sample showed the presence of sulphur dioxide to the extent of 2,400 parts per million.							None.
„ 18	Orange Pulp	On analysis this sample showed the presence of sulphur dioxide to the extent of 2,860 parts per million.							None.
April 3	Grape Fruit Pulp	This sample was found to be free from the presence of preservatives.							Consignment released.
„ 5	Rubbed Mint	This sample was found to contain about 40 per cent of leaves foreign to genuine mint. These foreign leaves mostly had the characteristics of the Ailanthus leaf.							Consignment re-exported.
„ 13	Strawberry Pulp	Sample contained sulphite preservative equivalent to 415 parts of sulphur dioxide per million.							Consignment released.
„ 13	Apple Marrow Pulp	Sample contained sulphite preservative equivalent to 880 parts of sulphur dioxide per million.							„
May 12	Sturgeon in Tomato	Sample contained tin and tin compounds equivalent to 0.53 grain of tin per pound.							„
„ 17	Yeast	Free from the presence of arsenic							„
„ 17	Yeast	Sample contained arsenic to the extent of 0.014 grain per pound.							„
„ 17	Yeast	Sample contained arsenic to the extent of 0.007 grain per pound.							„
„ 19	Crab Meat	Sample contained tin and tin compounds equivalent to 0.1 grain of tin per pound.							„
„ 19	Salmon	Sample contained tin and tin compounds equivalent to 0.2 grain of tin per pound.							„
June 14	Shelled Walnuts	This sample was found to be free from the presence of sulphur dioxide.							Consignment released.
„ 15	9 tins Sardines	These samples on analysis gave the following results:—							Reported to Ministry of
Sample No.				Lead, parts per million.					Health and Circular letter to Importers.
1				14
2				6
3				17
4				10
5				26
6				7
7				7
8				9
9				12
„ 29	Ice-powder	This sample was found to contain a considerable number of dark particles, which on examination under the microscope proved to be finely ground vanilla bean.							Consignment released.
„ 30	Sardines	Contained lead and lead compounds equivalent to 24 parts of lead per million.							Reported to the Ministry of Health.