Evolution and Progress
Evolution and Progress is a scholarly work, published in 1926 in ''American Journal of Public Health''. The main subjects of the publication include medicine and environmental health. Rendered clean, and the only sure test authors have of the freedom of the authors' milch cattle from tuberculosis.Each year shows better results and a smaller number of no-lesion reacting cattle.Those who use tuberculin most constantly and in the largest number of cases are those who are most ready to attest to its accuracy.Such a valuable agent should be understood, both as to its failures and its successes.