1757 work again. For the purpose of tracing the after-histories Dr. Staub continues to keep in correspondence with about 600 patients who have been at the sanatorium. Of the patients who were under treatment two years ago, 62 per cent. were still fit for work ; of those who were under treatment three, four, and five years ago the corresponding numbers fell to 52, 48, and 43 per cent. respectively. It was instructive to note the relation of those cases to the different stages of consumption. Of

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... he patients in the first stage, from 79 to 90 per cent. were still at work from three to six