20 MARCH 1909, Page 27

Sleeping Sickness: How to Avoid Infeetion. (Sleeping Sickness Bureau, Royal

Society.)—" Sleeping sickness is caused by the presence in the system of a minute organism (Trypanosome) which is conveyed. from the sick to the healthy by the bite of a species of Glossina (Tsetse), a genus of blood-sucking flies peculiar to Tropical Africa." The deadly species is the Glossina Palpatis. This is pietUred on the outside of the pamphlet. Inside are the likenesses of eight other flies, with the G. Palpalis in the prominent place. Its habits are described, and there are directions for the removal of houses, the clearing of areas, the placing of temporary quarters, with suggestions of how the pro- tection against the pest may be made more effective. We gladly give all the currency in our power to this useful publication.