the 1st, 2d, and 3d Biennial Reports of the California State Board of Health from F. W. Hatch, M. D., Secretary; the 1st Annual Report of the Georgia State Board of Health from V. H. Taliaferro, M. D., Secretary; the 4th Annual Report of the Minnesota State Board of Health from E. L. Griffin, M. D.; the 1st, 3d, and 4th Annual Reports of the Board of Health of the District of Columbia from D. S. Jones, Acting Secretary; the 1st, 2d, and 3d Annual Reports of the Virginia State Board of Health from L. S. Joynes, M. D., Secretary; the Annual Report of the Louisiana State Board of Health for the year 1875 from J. F. Fuller Esq: the Reports of the Metropolitan Board of Health for the years 1867 and 1868 and the Report of the New York Board of Health for the years 1871, '72, and '73 from Col. Emmons Clark, Secretary of the Board; the 1st, 2d, and 3d Annual Report of the Board of Health of the city of New Haven, from C. A. Lindsay, M, D., Health officer; the Annual Report of the Board of Health of the city of Pittsburg for the year 1875, from Crosby Gray, M. D., Health officer; the Report of the Board of Health of the city of Brooklyn, from 1873 to 1875, from Francis H. Stuart, M. D., Register of Vital Statistics; Executive documents Nos. 79 to 99, 2d session of 43d Congress, containing an account of the cholera epidemic of 1873 in the United States, from Col. F. H. Putney; the transactions of the N. H. Medical Society for 1875, and the transactions of the Wisconsin State Medical Society from 1868 to 1876 inclusive from the secretaries of these societies.

This office is also regularly receiving the weekly and monthly reports of the Boards of Health of various cities.

Acknowledgments are due to James Johnson. M. D., Health officer of the city of Milwaukee, to the secretaries of the State Board of Health of Massachusetts and of Georgia, and particularly to H. B. Baker, M. D., Secretary of the Michigan State Board of Health, for copies of circulars, blanks and other favors received from them. There has also been added to the Library of the Board by purchase, one copy each of the following books of reference:

Parke's Manual, Cameron's Manual, and Wilson's Handbook of Hygiene; Leeds on Ventilation; Fothergill's Maintenance of Health; Eassie's Sanitary Arrangement of Dwellings; Letheby's Sewage Question; Filth Diseases and their Prevention; Richardson's City of Health; Walker's Statistical Atlas; The Sanitarian. Volumes 1,

2, 3 and 4, and subscription to volume 5; Wanklyn's Water Analysis; Chamber's Diet in Health and Disease; Michael's Manual, and Mapother's Lectures on Public Health; Halton's Lectures on Sanitary Subjects; Hilton's Health and its Conditions; Waring's Saritary Drainage; and volumes 1 and 2 of the Papers of the Public Health Association.

There has also been purchased of permanent furniture for this office: 1 library table, 5 record books, 1 letter press, 1 letter book, 1 invoice book, 1 standard letter scales; and of consumable articles, letter paper, envelops, postage stamps and stamped envelops, and minor articles of stationery, such as ink, mucilage, elastic bands, lead pencils, &c., the specific items of which appear in the vouchers which have received your approval. A considerable portion of this stationery is yet unexpended.

The following is a summary of the expenses of the Board during the year, as shown by vouchers numbered from 1 to 37, inclusive:

The above amount includes all bills which have been audited by the Board, and all expenses which have been incurred up to the 31st of December, 1876, except such as are connected with the cost of printing and distributing extra copies of the annual report, bills for which have not yet been received.

Very respectfully,

J. T. REEVE, M. D.,

Secretary.

Preliminary Report on Contagious

Diseases.

Small Pox and its Prophylaxis.

BY E. L. GRIFFIN, M. D., OF FOND DU LAC,