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Related post: No. 7. Pot holes are often very prolific breeders of malarial mosquitos, and where at all prac- ticable should be filled or drained and thus permanently eliminated. Where it is not feasible to fill or drain them, it was shown by our experiments that mosquito breeding may be easily controlled in them by introducing the top minnow. No. 6. A pond bank having a heavy growth of water grass which must be removed be- fore the top minnow can reach and devour the mosquito larvae. the district. In the study of the water deposits of the district, and the conditions which favored, limited or prevented mosquito production, it was early noted that under natural condi- tions, without our aid or intervention, the indigenous, top feeding minnows which were found in many of the larger water deposits of the district, were maintaining a fair degree Female Rx Oil of mosquito control in these deposits by feeding upon and destroying the eggs and larvae of the mosquitoes. There were three varieties of the Female-Rx Oil top feeding minnows present in the district (Gam- busia Affinis, Fundulus Natalus, and Fundulus Nottii), but only the Gam- busia Affinis was present in any great numbers, and it was this fish which was functioning actively as a natural agent of mosquito control. The Gambusia is the common top water fish found throughout the hill sections of Mississippi and many other Southern States. Its distribu- tion in the United States, as stated by the United States Bureau of Fish- eries, is as follows: The Gambusia Affinis is found in fresh and brackish water from New Jersey to Florida, and in the Missis- sippi Valley from Illinois to Louis- iana, and thence to the regions of Texas and Mexico. It is excessively abundant in the southern part of the area outlined above. At the beginning of the active ma- laria season of 1919, with the in- formation obtained in 1918, plans were made for controlling mosquito production. An area consisting of a part of the observation area of 1918, and containing approximately twenty- two square miles, was selected in which the attempt to control mosquito production was to be made. The area contained 142 homes, housing 593 people. The remaining fourteen square miles of the 1918 observation district, containing thirty homes and approximately 237 people, was re- tained under observation as a control area no measures for mosquito con- trol being instituted. Anti-mosquito measures in the controlled area con- sisted of drainage and filling, training of stream and ditch channels, clearing away brush, vegetation, and debris, and oiling in emergencies where other measures of control were not ap- plicable. At the same time a pro- gram was arranged to increase the number of top minnows and to test them as agents of mosquito control in all classes of water deposits. The heavy precipitation occurring in the period from January to May, 1919, the continuous flooding of the low- lands, and the flooded conditions pre- vailing in practically all water de- posits in the districts greatly delayed field work, and it was not until July 1 that the entire area was under con- trol. Mosquito control was secured by the application of the following measures: 1. Drainage and filling: 25 water deposits were drained, or partly drained, and 4 filled. 2. Removal of debris and obstructions from and the straightening and training of stream channels, ditches, etc.: 9,552 yards of streams and ditches were so treated. 3. Removal of grass, weeds, brush and acquatic vegetation from, and the edging of the banks of ponds, pools, pot holes, etc. : Thirty-six ponds and numerous pools and pot holes, having a total shore line of approximately four thousand yards, were cleaned and edged and kept so throughout the season. February, 1922 THE NATION'S HEALTH 69 No. 8. Pot hole filled with brush and earth. The brush was use! to prevent the earth being washed out during heavy rainfalls Oiling was used as an emergency measure whenever other measures of control were not immediately appli- cable. A total of 178 i'.. gallons of oil were used during the season of 1919. (To be continued) Shoe Fitting Becomes a Science By SOLOMON STROUSE, M.D., Chicago, Illinois A FEW DAYS ago a business man told the following story: "I had at least twenty pairs of shoes at home, and could not wear a single pair longer than a week. No one seemed able to give me the proper shoe. Whether they were custom made or bought from stock, I could get no real foot comfort. And not having real foot comfort made me feel out of sorts all over. Finally, a doctor friend advised me to go to a shoe store where they are more in- terested in properly fitting shoes than in shoo sales, and where all the sales- men have made a special study of feet and shoes. Although naturally skeptical, I did finally try them out, did finally get shoes which fit my feet and give me solid comfort." This is not an exaggerated state- ment. Most individuals would be un- able to maintain a stock of twenty pairs of shoes, but there are only too many people whose complete stock of one pair represents a stock of mis- fits. Foot comfort is a rare thing Related links: kamagra gold 100, Where To Buy Imodium, Amoxicillin And Clavulanate Potassium 875 Mg, Hyaluronic Acid Glucosamine Chondroitin, 50 mg zoloft safe pregnancy, Buy Gyne-Lotrimin, Order Acular Online, Allopurinol Gout, Purchase Apcalis Online, Bactroban Cost