Scarlet fever made its appearance in Valparaiso, Ind., September, 1908, and continued until June, 1911. It is estimated that during this time there were 400 cases, of which only 255 were reported to the city board of health, 145 were not reported and most of them were not subjected to quarantine regulations. Beginning in February, 1911, a special study of the epidemic was begun to determine, if possible, what steps were necessary to terminate this epidemic.
The question whether the infection was being spread through the medium of books was considered. If books were carriers of scarlet fever infection, the opportunity for the spread of the disease in this city by them was very great, as Valparaiso is a residence and school city with about 10,000 population. It supports two libraries, one a public city library, the other a public library in connection with the Valparaiso University. The libraries were