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the figures were confirmed. At the time it was suggested that sampling was the cause of these discrepancies. Advantage was taken of the presence in London of Mr. Branson, Government Analyst, who investigated the problem of tin sampling. As a result modifications of the London method of sampling have taken place.
28. Wolfram ore, refined tin and lard are the three principal materials submitted from non-official sources. In the case of lard an increase of 300% has taken place.
Sampling.
29. The following list gives the amount of sampling done by the Sampler attached to the Laboratory.
3,668 Tons.119,211 Cases. 14757 75 Tons. 5 Drums. TinLard GheeWood Oil Cassia OilFirecrackers 2,978 Cases. Manganese ore250 Tons. Bismuth ore41 1,798 Samples.Water samplesSpecial Investigations.
30. As mentioned elsewhere further work was carried out on the composition of urinary stones. An investigation into the pollution of bathing beaches by sewage was attempted on the lines of the Colombo Harbour experiments (Rae. Journal of the Institution of Municipal & County Engineers 1924 p. 1074). Owing to the high dilution of sewage caused by the open nature of the beaches no reliable inferences could be drawn from the analytical figures and the investigation had to be abandoned. Owing to the absence of Mr. Branson, Government Analyst and the pressure of chemico-legal work no fresh investigations could be initiated.
Staff & Equipment.
31. Mr. Branson, Government Analyst, was on leave during the whole of 1935. During this period he pursued a course of study and was successful in gaining the F.I.C. in Branch E. Mr. Branson also attended the 41st Regimental Anti-gas Instructions course at Winterbourne Gunner and obtained the qualification "Distinguished".
Mr. Jackson continued to act as Government Analyst during the year.
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