Popular Science Monthly/Volume 38/February 1891/Notes
|←Popular Miscellany||Popular Science Monthly Volume 38 February 1891 (1891)
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In reference to a note in the Monthly for December, 1890, ascribing to Dr. Charles M. Cresson the discovery of typhoid bacillus in juices squeezed from celery, Dr. Cresson desires to observe that the only publication he has made in reference to the bacillus of typhoid in connection with celery, bore upon the practice of certain truck-farmers of ladling upon the plants, for manure, untreated night-soil directly from the carts. Some of the stuff is certain to lodge in the interstices of the plant and not be washed off, and that may contain typhoid bacilli. No claim has been made or facts given that would warrant the assertion that the bacillus was naturally carried in the juice of the plant.
Prof. Pickering describes, in the Sidereal Messenger, fourteen photographs of the planet Mars, which were taken on two successive days, the 9th and 10th of April, seven on each day, in the second of which the southern polar white spot was much larger than in the former series. In the first day's photographs the spot was dimly marked, as if veiled by fog or by particles too small to be represented separately; but on the second day the region was brilliantly white. The date of the event corresponded with the end of the southern winter of Mars, or with the middle of our February; the event itself was a snow-storm.
The fibrous plants of the island and their capabilities will furnish an important department of the exhibition to be held in Jamaica in January, 1891. Among the native plants of this class are those of the aloe, banana, pineapple, plantain, and nettle families. The managers particularly desire to have a full showing of machines for extracting fibers; and liberal prizes have been offered for the best, provided that no less than three manufacturers compete. Small and inexpensive machines are preferred.
Two theories in regard to the treatment of milk have been tested at the Agricultural Experiment Station, at Cornell University, and both proved mistaken. The way generally practiced for getting the most cream from milk is to set the milk in deep cans in ice water. It has been asserted that the addition of an equal quantity of water, either hot or cold, to fresh milk in deep cans would secure rapid and complete creaming. The experiments show that the proposed treatment is not nearly as effective as the accepted one; moreover, when hot water was added, the milk was sour at the end of twenty-four hours, and in some cases the cream was injured for butter-making. Setting in shallow pans in the air was found to give better results than any other practice, except deep setting in ice-water.
In a paper read at the meeting of the American Association, Prof. J. E. Siebel sought to show that certain fixed relations exist between the quality of a water and the geologic horizon from which it is derived in a given locality, and that by measuring and analyzing supplies of different depths, with proper precautions, considerable information can be obtained. In applying his method to the underground water-supply of Chicago, the author found that at least six waters could be differentiated in that neighborhood, each having a well-defined and pronounced character.
Some new Indiana crustacean fossils, described by Charles E. Newlin, are found about half a mile south of Kokomo, in a single ledge of the water limestone of the lower Helderberg formation. They are footprints, and appear to be new to the paleontology of Indiana, 576
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��The Appomattox formation of the Mis- sissippi embayment described by W J Mc- Gee, which Prof. Stafford identifies with his La Grange formation in Tennessee, corre- sponds with an area extending from the coast along the Rappahannock River west to the Mississippi and north into Tennessee, which is covered with an interstratified sand and clay, susceptible to erosion and much affected by it. It is said that three fourths of the formation have been removed by ero- sion. The formation overlaps in irregular lines the Tertiary strata of Virginia. White kaolin, or feldspar clay, is often detected in it, and large quantities of white clay of com- mercial value have been uncovered in the northern part of Mississippi.
The Redonda phosphate, described by Prof. Hitchcock in the American Geological Society, is found in the volcanic island of Redonda, in the Caribbean Sea an island with perpendicular walls five hundred feet high, which the visitor must scale with wind- lass and rope. The phosphates are found, nearly forty per cent pure, nearly devoid of lime, under a vast quantity of guano. They are not crystalline or fossiliferous, and occur in sheets between the layers of lava, or in pockets. The existence of this valuable substance at such a place has never been satisfactorily accounted for.
According to a paper by Prof. S. Coulter, Indiana, which is the fifth lumber-producing State in the Union, has one hundred and six species of trees, belonging to twenty-four orders. The most uniformly distributed tree is the sugar maple, which is found in every county. The author thought that geological formations had comparatively little effect in the distribution of forest trees in the limited area of the State, but that the chief influence came from the elevation of certain general sections and of particular localities, the courses of the streams, and the location of swamps. The forest area of the State has been reduced to 2,000,000 acres, about one tenth of the total area.
Prof. H. W. IIenshaw, describing the Indian method of making maple sugar, main- tained that the knowledge of the sugar and the process were aboriginal, dating from times unknown, and not in any degree de- rived from the white man. Indians collect the sap in bark vessels, which in some cases hold a hundred gallons. They take advan- tage of cold April nights to freeze the sap, and in the morning throw out the ice. They evaporate the sap by throwing hot stones into the reservoirs. They make sugar also from the silver maple and box elder, and, in Canada and Manitoba, from the birch tree. The sugar is eaten mixed with corn. Veni- son and rabbits are boiled in the hot sap during the process of evaporation. Some- times pure sugar is the only diet of Indians for a month.
��Mr. M. P. Mayo Collier disputes the conclusion accepted by many authors that " flat-foot " is due to a general want of tone in the fibrous structure of the body, and traces it by an elaborate physiological argument to overstrain of the ligaments and overpressure upon the os calcis, which may be produced by wearing high heels. For treatment of the malady he recommends good food, fresh air, and as much rest as possible, with a radical change in the con- struction of the boot. The toe and heel should change places ; or a good laced boot should be worn, with the sole an inch thick in front and fining off to a line or two at the heel. By this means the normal incli- nation of the os calcis could be maintained, and the weight of the body properly dis- posed of.
According to Prof. F. V. Colville's sum- mary, in the American Association, of the organization of the Botanical Division of the Department of Agriculture, the work is di- vided into two chief parts, the economical and the scientific ; the latter includes some special investigations on forage plants in the Western arid lands. The authoritative po- sition of the bureau gives it special facilities for making exchanges with other countries. The results of the work are published as bulletins and contributions from the scien- tific investigation. An immense amount of valuable material is being collected in the herbarium. A resolution was passed by the Association calling the attention of the de- partment officers to the necessity of better protection for the collections against fire.
Prof. Joseph Moore reports that an en- tire skeleton of Casteroid.es ohioensis, or beaver of the days of the mastodon, has been found in Randolph County, Ind., a few miles east of Winchester. The bones indi- cated an entire length of the animal of five feet nine inches, and that its gnawing powers were commensurate with its size.
Prof. O. A. Derby explained to the American Association his method of sepa- ration, by means of the batea, or Brazilian miner's pan, of rare and heavy accessory elements in rocks. By this means certain minerals, regarded as extremely rare, have been shown to be common and widely spread. By his new method of search he had, on the day of his arrival there, found in rocks of New York State minerals never before found in those rocks in this country.
The Austrian Minister of Public Instruc- tion reported some time ago that the evil of overpressure in the public schools was real and extended, and that its source was not so much in the course of study as in the method pursued. As remedies, he advised a better division of the holidays, and aboli- tion or reduction of written exercises and of memorizing.