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95
9 samples of water were examined. Of these 3 samples of well
water examined for purity were satisfactory chemically but slightly
turbid. 3 samples of drainage water suspected of sewage contamination
were satisfactory, 2 samples examined for lead were free from lead and 1
sample, complaint of taste and smell, was satisfactory.
Some of the figures obtained from the analysis of the well waters mentioned
above are interesting.
The analysis showed:—Free ammonia as NH3, 0.059 parts per 100,000;
albuminoid ammonia as NH3, 0.001 parts per 100,000; oxygen absorbed 0.016
parts per 100,000 and chlorine, as sodium chloride, 27.7 parts per 100,000.
The high free ammonia and chlorine figures are characteristic of waters
obtained from deep wells (in this case 450 feet) in the London area.
6 samples said to have caused illness consisted of:—
Butter, Pickled Onions, Apple Tart, Lettuce, Watercress and Smoked
Salmon.
All the above samples were free from impurities or added substances of
a harmful nature.
5 samples of Olive Oil for export were satisfactory.
3 samples examined for tin were satisfactory, these were:—
Japanese Pilchards (2) containing 1.7 grains and 0.7 grain tin per
pound respectively and Russian Pilchards containing 0.77 grain
tin per pound.
Other samples analysed were:—Formalin (2) and Accumulator Scrap.
Rag Flock Act. According to the standard of cleanliness required by the
Rag Flock Regulations, rag flock must not contain more than 30 parts of
chlorine in 100,000 parts of the flock. One informal sample examined was
satisfactory, the chlorine content being less than 5 parts per 100,000.
Borough Engineer.—24 samples comprised :—Bitumen 19, Carbolic Powder
3 and Water 2.
Public Cleansing Officer.—4 samples of Carbolic Powder examined were
satisfactory.
Borough Electrical Engineer.—1 sample of Water was submitted for
analysis.