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Public Health Service Investigation Commission to the China-Burma highway, Chefang (vicinity), China. Testing for anopheles minimus inlet and outlet irrigation ditches. No minimus were found in the ditch that is damned up, yet there were many in the ditch where water is flowing

Public Health Service Investigation Commission to the China-Burma high...

Public domain photograph related to Chinese history, free to use, no copyright restrictions image - Picryl description

Public Health Service Investigation Commission to the China-Burma highway, Chefang (vicinity), China. Oiling anopheles minimus breeding place

Public Health Service Investigation Commission to the China-Burma high...

Public domain photograph related to Chinese history, free to use, no copyright restrictions image - Picryl description

Public Health Service Investigation Commission to the China-Burma highway, Chefang (vicinity), China. Small irrigation ditch in the rice fields formerly had anopheles minimus mosquitoes breeding in pockets all along it. It has been rechanneled, as indicated by the new mud piled up on both sides. But the cattle have already trampled it; vegetation is growing in the cattle tracks and minimus are starting to breed in it again. The ditch had to be dusted with Paris green

Public Health Service Investigation Commission to the China-Burma high...

Public domain photograph - historical image of France, free to use, no copyright restrictions image - Picryl description

Wilson Dam, Alabama (Tennessee Valley Authority (TVA)). Collecting anopheles mosquitoes in malaria control area

Wilson Dam, Alabama (Tennessee Valley Authority (TVA)). Collecting ano...

Public domain photograph of Alabama in 1930s, free to use, no copyright restrictions image - Picryl description

Public Health Service Investigation Commission to the China-Burma highway. A village street along the Burma road with a ditch running down the center. The anopheles minimus mosquito will not breed in this dirty water

Public Health Service Investigation Commission to the China-Burma high...

Public domain photograph related to Chinese history, free to use, no copyright restrictions image - Picryl description

League of Nations Malaria Investigation Committee to India. A concrete-lined ditch which was the type of open ditch in which the anopheles minimus mosquito would not breed in this section of India

League of Nations Malaria Investigation Committee to India. A concrete...

Picryl description: Public domain vintage artistic photograph, free to use, no copyright restrictions image.

Public Health Service Investigation Commission to the China-Burma highway, Chefang (vicinity), China. Quiet water full of hoof prints containing back-water from a stream. There are no anopheles minimus

Public Health Service Investigation Commission to the China-Burma high...

Picryl description: Public domain photograph of farming, farmer, agriculture, 20th-century, free to use, no copyright restrictions.

League of Nations Malaria Investigation Committee to India. A stone-lined ditch, a method proved ineffective in preventing breeding of anopheles minimus. Vegetation sprang up quickly in the cracks between the rocks and in this vegetation minimus was breeding

League of Nations Malaria Investigation Committee to India. A stone-li...

Picryl description: Public domain image related to politics, political campaigns, committee, free to use, no copyright restrictions.

Public Health Service Investigation Commission to the China-Burma Highway, Chefang Valley, China. Taking sample of water to test from a typical breeding place for anopheles minimus

Public Health Service Investigation Commission to the China-Burma High...

Public domain photograph related to Chinese history, free to use, no copyright restrictions image - Picryl description

Public Health Service Investigation Commission to the China-Burma highway, Chefang (vicinity), China. Oiling anopheles minimus breeding places

Public Health Service Investigation Commission to the China-Burma high...

Picryl description: Public domain vintage artistic photograph, free to use, no copyright restrictions image.

Public Health Service Investigation Commission to the China-Burma Highway, Chefang Valley, China. Taking sample to test for anopheles from the Old Fort seepage. There is soap controlled breeding for 300 feet

Public Health Service Investigation Commission to the China-Burma High...

Public domain photograph related to Chinese history, free to use, no copyright restrictions image - Picryl description

League of Nations Malaria Investigation Committee, Punjab, India. A typical village of the Punjab plains. There is always a tank in the foreground from the mud of which the walls of the village in the background were made. These tanks produce anopheles culicifacies mosquitoes during and immediately after the monsoon. When they become dirty they do not produce anophelinae

League of Nations Malaria Investigation Committee, Punjab, India. A ty...

Public domain photograph of a lake, river, pond in the woods, forest, free to use, no copyright restrictions image - Picryl description

Public Health Service Investigation Commission to the China-Burma Highway, Chefang Valley, China. Close-up of the vegetation at the edge of a stream. Anopheles minimus breeds in the water along the vegetation

Public Health Service Investigation Commission to the China-Burma High...

Public domain photograph related to Chinese history, free to use, no copyright restrictions image - Picryl description

League of Nations Malaria Investigation Committee, Punjab, India. Cattle tracks in a sand bar. Anopheles culicifacies larvae were found in these tracks. In contrast to the anapheles minimus, which breeds in gently flowing water, the culicifacies prefers still water

League of Nations Malaria Investigation Committee, Punjab, India. Catt...

Picryl description: Public domain vintage artistic photograph, free to use, no copyright restrictions image.

Public Health Service Investigation Commission to the China-Burma Highway, Chefang Valley, China. The edge of a seepage area. Water wells up out of the ground at right. Anopheles minimus breeds in the vegetation to its left and right. There is no minimus in the quiet water to the left

Public Health Service Investigation Commission to the China-Burma High...

Public domain photograph related to Chinese history, free to use, no copyright restrictions image - Picryl description