The value of health to the family, to the community and to the nation has come to be understood and appreciated as it never was before. During the last few decades public sanitation has made surprising progress. The positive discoveries relating to the protection and preservation of health have proved their verity by their practical application, and have strengthened the claim of public hygiene to be ranked among the applied sciences. In scarcely any department of human progress have the indications of successful accomplishment been more marked, more satisfactory, or of greater direct value to the welfare and happiness of mankind, than in the unfolding and development of the principles and natural laws upon which modern scientific public hygiene is based.
Let us take a retrospective glance at the beginning of a movement which is still progressing with an undiminished impetus. In the East End of London, known as Whitechapel,