A Malario-Economic Survey in Rural South India *This paper is based on observations made as a part of the programme of Malaria Investigations, a project under the auspices and having the support of the International Health Division of the Rockefeller Foundation, co-operating with the Health Department of Madras Presidency and the Pasteur Institute of Southern India, in Coonoor. The authors are grateful to Dr. V. P. Jacob and Mr. T. Ramachandra Rao, of the staff of Malaria Investigations, for their assistance.

An Insectary Colony of A. Stephensi Mysorensis *The observations on which this note is based were carried out as a part of the programme of Malaria Investigations, under the auspices and with the support of the International Health Division of the Rockefeller Foundation co-operating with the Health Department of Madras Presidency, the King Institute of Preventive Medicine in Guindy, Madras, and the Pasteur Institute of Southern India in Coonoor.

Some Social Obstacles to Malaria Control *This paper is one of a series arising from Malaria Investigations, a research project under the auspices and with the support of the International Health Division of the Rockefeller Foundation co-operating with the Health Department of Madras Presidency and the Pasteur Institute of Southern India in Coonoor.

On Using Water Instead of Dust for Diluting Paris Green in Malaria Control *This note is based on some routine studies of malaria investigations, a project under the auspices and with the support of the International Health Division of the Rockefeller Foundation co-operating with the Health Department of Madras Presidency and the Pasteur Institute of Southern India, in Coonoor, Nilgiris.

The above ingredients were added, in the order mentioned, in a Winchester bottle holding 3 litres and thoroughly shaken. (The total volume will be found to be 480 c.cm.) For convenience, separate tins of definite volume were used for measuring out kerosene oil and Paris green. The latter can be measured easily in a tin and, if quite dry, can be poured. The stock suspension must be thoroughly sh...

On Agricultural Malaria and Its Control with Special Reference to South India *This paper is based on observations made in the course of malaria investigations in South India under the auspices of the International Health Division of the Rockefeller Foundation, co-operating with the Madras Health Department, and the Pasteur Institute of Southern India.

This paper presents some observations and reflections on the subject of the interrelationship between agriculture and malaria. It is based primarily on six years of intensive malaria surveys and research studies, in which medical, biological, and engineering, as well as agricultural aspects of the subject were explored by a group of specialists in South India. Quoting Hehir (1927), 'compared wi...

A Water Emulsion of Pyrethrum Extract for Spray-Killing Adult Mosquitoes *These studies were made under the auspices and with the support of the International Health Division of the Rockefeller Foundation, co-operating with the Madras Health Department, and the Pasteur Institute of Southern India. The authors are indebted to N. R. Sitapathy, assistant engineer, and T. S. Rama Rao, technical assistant, for their collaboration.

The results of Ross (1936), De Meillon (1936), Covell et al. (1938), Russell and Knipe (1939, 1940, 1941), and Russell et al. (1942) leave no doubt that wherever the mosquito vector of malaria spends its daytime hours inside houses, cowsheds, or outbuildings, routine spraykilling with pyrethrum sprays will effectively interrupt the transmission of malaria. This measure is based on the principle...