M 106
In addition to the above, the sampler took 1,302 samples of water.
MISCELLANEOUS SERVICES.
In May the Laboratory staff again carried out a treatment of the Colonial Secretary's Office records and Library with hydrocyanic acid gas. 30 grammes of gas per 1,000 cubic feet was supplied for 48 hours and according to reports received later the treatment was quite successful. Two similar treatments were applied to the records contained in the strong-room of one of the local Banks. These records were infested with white ants and in this case it was necessary to use three times the above concentration to effectively deal with the trouble.
The Laboratory was also called upon to investigate the cause of corrosion of some electrical wiring in the British Consulate at Swatow.
REVENUE.
The fees paid into the Treasury during the year amounted to $19,891.50 as against $24,974.00 in 1929. The value of the work done, Government and commercial, as determined from the Tariff of Fees (Government Notification No. 439 of 1918) was $52,751.50 as against $51,659.00 in 1929.
STAFF.
Mr. V. C. Branson, the First Assistant Analyst went on leave on the 23rd April and returned to the Colony on the 8th October.
No other changes have taken place during the year.