Page:Popular Science Monthly Volume 38.djvu/445

Rh respiration of insects has been the subject of study by M. Contejean, who has found that, contrary to what takes place in vertebrates, the movement of inspiration is passive and that of expiration active. The air is driven from the body by a contractile effort. Hence, when the insect is wounded, the flow of blood occurs at each expiration. The respiratory movement is not interrupted by cutting off the head, nor by the absorption of curare, whchwhich [sic] produces an immediate cessation in man.

thinks that he is able to assume, from a comparison of the records of a number of years, that the moon has an influence in lowering the height of the barometer in the months from September to January, at the time of full moon, and in raising it during the first quarter. His views are confirmed by the independent studies of Captain Seemann, of the Deutsche Seewarte. No effect has been perceived in the other months.

property marking bacteria and bacilli of absorbing aniline and being killed by it has been put to good use by two German observers, Messrs. Stilling and Wortmann. Having demonstrated that the violet aniline dyes, without arsenic, were not poisonous to rabbits and guinea-pigs, the authors produced eye-disorders in those animals, and treated them successfully with aniline. They then tried the human subject, and cured a skin-ulcer on a scrofulous child, by daily dropping a little aniline solution on the sore. Similar good results were had with bad cases of eye disease; and it soon appeared that many surgical cases were open to treatment in this way, and that, in general, wounds and sores developing suppuration could be sterilized with aniline. It is thought that cases of internal inflammation may also be within reach of this treatment.

have been granted in the English civil list to Dr. Huggins, the widow of the Rev. J. G. Wood, and the four unmarried daughters of the late Rev. M. J. Berkeley.

regards consumption as depending on conditions that reduce the breathing surface of the lungs below a certain proportion to the rest of the body. The conditions include sedentary overcrowding, want of exercise, defective seats, ill-fitting clothes, and whatever may impair the lungs or lead to undue compression of the chest. Remedies should be sought in free country life, well-ventilated rooms, suitable chairs, and clothing free from constriction and not too heavy The earliest physical training should aim at the full development of the thorax. Persons whose breathing capacity does not measure up to the normal should not engage in any occupation tending to constrain the chest or to expose the lungs to the inhalation of dust.

has published a paper on the floral biology of the flower Episcia maculata, a plant which, recently sent over from British Guiana, first flowered at Kew last summer. It is remarkable in that the flowers are never open, but the front lobe of the corolla is from the first folded back, so as to close the mouth like a cork. Nevertheless, all the arrangements are such as are adapted for cross-fertilization by the agency of some insect. The plant is unique in being at once closed and yet requiring the visit of an insect for its fertilization.

is to be taken of the height of the Eiffel Tower to fix in it a manometric tube in which mercury can be poured to form a column that will give a pressure of four hundred atmospheres. M. Cailletet hopes to be able to make use of this enormous pressure in continuing his experiments on the liquefaction of gases.

of floridite, or phosphate of lime, described by Prof. E. T. Cox as found in Florida, occurs in beds from a few feet to thirty-seven or more feet deep at places, over an area of 120 miles north and south, and 20 miles east and west, and consists of 80 per cent pure phosphate. The author believes that it is derived from the mineralization of an ancient guano.

crumpled and crushed form of the human ear is accounted for by Prof. II. D. Garrison as a result of the habit of lying on the side of the head, which habit has been induced by the increasing weight of the brain. The question, says the author, in his paper on the subject, read at the American Association, had originally been whether the animals through which it had been developed would profit most by large brains or by perfect and symmetrical hearing apparatus, and had been promptly decided by natural selection in favor of large brains.

Biological Section of the American Association has approved of a movement to establish a biological station on the Gulf of Mexico, for which subscriptions of $25,000 have been promised. The station will probably be located at Tarpon Springs, Fla., where there are fine opportunities for the study of fresh and salt water, as well as of land forms.

has been chosen to be President of the next year's meeting of the British Association to be held in Cardiff, Wales. The meeting of the Association in 1892 will be held in Edinburgh.

speaking of the Food of Bees, remarks that the carbohydrates are sufficient for the life of the insects, but that they must have nitrogenous food to support them during the process of reproduction. The former they derive from the honey of plants, the latter from spores, grain, fungi, and bee-bread.