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POPULAR SCIENCE MONTHLY.

name Pitt-Rivers, his chief interest seemed to be in the earth works and tumuli of Cranbourne Chase, and the extensive memoirs he has published and the museum he has established show what good use he made of the excavations. Some of the results of his earlier work will be found at Oxford, but he built at Farnham, in Dorsetshire, a museum which contains collections of the greatest possible value.

 

The communication in this issue signed 'Physicist' is worthy of note. If what its writer says is true, it is evident that a reputation as a brilliant inventor does not insure that its possessor is a safe writer about general physics. Our correspondent, who represents fairly the opinion of scientific men in general, finds fault with Mr. Tesla's article in the June Century in many important particulars. During the years since Mr. Tesla's notable invention of the polyphase alternate current transformer, he seems to have become less definite and exact in his thinking, and less productive as an inventor. The speculation and rhetoric of the Century article are certainly disappointing to every one who is trying to bring about an intelligent and sound view of science on the part of nonscientific people. Men of science everywhere should certainly make it their business to instruct people in general about the progress, and even the prospects, of science through the press, but it takes wisdom on the part of both writers and editors to know what is instructive and what is misleading. Honest criticism such as that of our correspondent is therefore highly desirable.

 

It is generally agreed that the most important advance of last year in the science of medicine was the discovery that the parasite causing malaria was transmitted from person to person by mosquitoes. Dr. Manson describes this discovery fully in this number of the Popular Science Monthly. This summer a crucial experiment is being made of a somewhat dramatic character. A mosquito-proof tent has been constructed, which is located in Italy, in the Campagna. In this Dr. Luigi Sambon, lecturer of the London Tropical School of Medicine, and Dr. G. C. Low will live until October, taking the utmost care not to be bitten by mosquitoes. If they escape malaria it will serve as corroborative evidence that the mosquito is the means of infection. On the other hand, several Englishmen, including Dr. Manson's son, have offered themselves as subjects for the complementary experiment. They will live in a healthy district, but will definitely allow themselves to be bitten by mosquitoes which are known to be infected. These experiments will probably be particularly useful in demonstrating to the public at large the validity of the hypothesis derived last year from technical bacteriological evidence.