Nevada County picayune., 1890-07-02
SCIENCE AND INDUSTRY.

A method of expanding hoops and wheel tires by heating them with the electric current has been devised.
 Experiments recently made by Dr Luderitz in the Berlin IIygienic Insti- ute indicate that all kinds of bacteria are killed by coffee.
 On branch road of the Canadian Pacific, near Sudbury, Canada, Is nickel mine that produces more nickel than the worlds market calls for. The output is said to be 1000 tons annually.
 The conclusions reached by modern meteorologists are that cyclones of great intensity are ascending spiral whirls Of wind having rotary motion in direc- tion in the northern hemisphere oppo- site to the movements of the hands of watch.
 It has been calculated by II. o. Tumlirz that the light reaching the pupil of the eye in each second of time represents quantity of work which would require one year and eighty nine days to raise the temperature of gramme of water one degree centimeter Q.s degrees Fahrenheit)
 Scientists say that the duration of lightning flash is not infinitesimal, but that the flash lasts a measurable time. For example, If one sets a camera in rapid vibration and exposes in it plate so as to receive the impression ot the flash, it is found that the impressions appear widened out on the negative. showing the negative to have moved during the time the flash was in ex- istence.
 A movement is begun in Germany to utilize to a greater extend the banana fiber which extends the entire length of the branchless plant, and is capable of being divided into breads of silky fneness. In Central Africa this fiber is dried and used for shoe-strings and for cords and ropes, but 1t is believed that it could be used in various manufac- lures, the same as cotton, hemp, flax and similar plants.
 Two improvements in the mechan- ism of musical instruments are reported. The first of these, an invention of Herr Emil Olbricht, a pianist, of Berlin, is a scheme for raising the white keys of piano to the level of the black, or, if necessary, little above them. The other novelty is the encouragement of the holes of the bassoon, which is said to make playing the instrument easier and more satisfactory. IL is the dis covery of Herr Reinhold Lange, a mu- sician of Wiesbaden.
 Experiments to prove the virtues of salt in keeping farm crops in healthy and yicnrCus condition hayr bppn car- ried on extensively in some parts of England and the results lead to the following conclusions: That dressing of l, 300 to 1000 pounds of salt per acre will check the rustin cereals, the finger and-toe in turnips. largely protect oats against the grub and wirc-wOrm, check the virulence of potato disease, and dissipate fungoid growths in pastures. It is also a preventive against moss, makes rough grass more palatable, and sweetens the herbage generally.
 A paper goods manufacturer in Dresden, Saxony. is sending to the trade in this country sample tool handles made of paper. Thsy are light, and apparently strong and durable. They closely resemble the ordinary wooden handles but are said to be more durable than the latter, ani have the added advantage of never splitting when driven into sockets, as the paper will yield more than is po,sible with wooden handles. The bore pt one-six. teenth inch may be increased to three fourths inch without injury to the hand Ia