[The input of the free economic society of study of problem of children mortality].
The Free economic society is the first scientific society in Russia which, among many other problems, considered issues of medicine. The society possesses prominent accomplishments in spreading smallpox vaccination. In 1833 the Free economic society declared a competition for best writing about causes of high mortality among children at first year of life and measures of combatting. The work by I.R. Lichtenshtedt was approved as the best and published in 1840.