The Arkansaw traveler., 1889-08-31
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 SCIENTIFIC MISCELLANY.

London is aid to have 10 less than thirty vege- tarian restaurants and one vegetarian hotel The Cape dc Ia Heve lighthouse, In Fnnoe, is being lighted experimentally by the current from sccnmnlAtors kept charged by two dynamos driven by windmill
 For deafness of old age. sapoini, of Milan, swabs the membrana tympani with . weak oleaginous solution of phosphorus. He claims to have stimu- lated the action Of the membrane and improved the hearing in sixty-two cases
 An English inventor lays claim to an electric railway lAmp-not controlled by clock work which is lighted by the dropping of . penny into the apparatus, and continues to shine for period of from two minutes to several hours, according to adjustment.
 In the decade ending with 1886. theiron produc- tion increased l45.69 per cent in America, 134.92 in Germany, and s.s6 In Great Britain. The Bes- semer steel increase was about 800 per cent in the United States, POO in Germany, 575 In Russia, and little over 100 in Great Britain.
 A peculiarly agreeable intoxication is produced by the inhalation of naphtha fumes and attention has been drawn to the increase of the "naphtha habit' among the female employees in rubber facto- ries. The habit Is sAid to have been introduced into America from Germany, and to be found chiefly in New England.
 Seismograph observations have been made on the new lay bridge by Prof. Ewing. The instrument was placed on tho southernmost portion of the great girders and the train came on at the Dun- dee end, . mile and . half away, oscillations of l.OOUtn OI An men were oDeefvaOe, increasing Rs the train advanced to c maximum of one- half inch. DYNAMos IN TELEGRAPHY.-The direct use of dynamos in telegraphy has been a failure, but MT. ". H. Preeoe F. R. g., declares that their use ind- rectly, through secondary batteries has been emil nently successful At the general post-ofRce in l London there are 220 circuits thus worked from only thirty eight cells. The currents required are very minute compared with those used for electric | lighting that for one dfty-watt glow lamp being sufficient tor ten telegraphic circuits.
 | AN UNSAFE PRorEcToR.-About half of the many anti .fouling compositions now employed for ves- sells make use of copper which Prof V. B. Lewes condemns as very dangerous to iron and steel ves- sells. When such coatings are perforated, copper will be deposited on the iron and result in rapid corrosion. If several vessels in the same basin, any one of them coated with such c composition endangers all, either through the minute particles of copper worn of and transported by the water, or through galvanic action between the vessels. | VEGETATIoN-CARvED RoCKs.-In New Provi- dence and other islands of the Bahama group are numerous so-called "banana holes" ranging in size from that of pint cup to that of large cistern. Prof. c. s. Dolley, who has lately studied these holes, finds that they cannot have had the same origin as pot holes, and do not appear to have been cut out by the waves and he can only account for them effect of the action of decaying vegeta- ton. Large quantities of leaves and other vegetable matter are found in the holes, and 1t Is probable that the soft calcareous rock has been dissolved by the fermentation products, and washed away. PLATING or INSECT WNGs.-The slow Tapping of the butterAy's wings is perfectly noiseless but more rapid movements of insect-wings produce sounds increasing in shrillness with the number of vibrations. Sir John Lubbock has shown by some of his later observations that the wings of the housefy give the sound F. and vibrate 90 100 times 6 minute, or SS5 times . second and those of the bee yield the sound A, vibrating many 400 times a minute or 40 times . second, though a tired bee may hum on K, making only SS0 vibra- tions . second. Marcy has confirmed these theo- retical numbers by placing fly that at each vibration the tip of his wing made . mark moving cylinder, the actual record being sS0 strokes . second.
 MILITARY DoGs-The systematic use of dogs in military service has recently been proposed and 1t