The last annual report of the Connecticut Board of Health, a volume of over 300 pages, just published, contains the history of an epidemic of typhoid fever in Waterbury, occurring in the midsummer of 1890. The special paper in the report, tracing the outbreak to " dairy typhoid," or to infection by typhoid-impregnated milk, was written by Dr. Herbert E. Smith, professor of chemistry in Yale Medical College. Dr. Smith was detailed to investigate a sudden outburst of fever in June, 1890, of about fifty cases in a period of twenty-three days, limited to thirty-five families within the town. Not much success has, in this country, attended investigations intended to prove the relations of milk to typhoid fever; but in this instance we are presented with proofs of these relations that appear to be irrefutable. Although milk-typhoid has undoubtedly occurred in this country more frequently than has been generally known, there