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99 in THE LANCET (vol. i. page 632) as far back as 1862. I then strongly recommended the issue of preserved potatoes to ship's companies in all vessels proceeding to China, and on other long voyages. I also recommended the use of condensed water in all cases where good and pure water could not be obtained. As you remark, " when distillation cannot be resorted to, every means should be taken to purify river or I , well-water by hltration, boiling, and the use of permanganate of potash, of whichdoi:10.1016/s0140-6736(02)67160-0 fatcat:tt5f4b44qre7jls3tcl2qsgxs4