The Montgomery advertiser., 1901-12-08

tance of each other. the uitra-v,ue. Ue,. rays, of light from the lamps act upUH - the respective electric apparatus, set & a tomatic brakes in notion, ana thus stoP the engines whether in daytime or ae night" Obviously, 1t Is scarcely posslple to oyerrate the importance or this insen ious contrivance assuming tnat .hn be fitted to real trains ana or this ehe professor entertains no doubt.
 Perpetual Electric Light.
 An "eIectric lamp which requires no current and will burn forever has been discovered in 'radidm, an element Wnich possesses the remarkable property or be- ing spontaneously luminous Tn the oark. Ii is not likely to come into general use, however, for it's prime cost IS enormous It is obtained from the uranium minerals, a ton of which will yield about hall ar ounce of radium with the expendlture ol six tons of chemicals and the use Of nfty tons of water for washing. It's lumlnes- cence does not arise rom exiuAtion' like that of phosphorus. but IS que 10 continuous emission of electrified par ticles. whose charge Is enormous, but whose mass is so small that the JOSS III weight would be less than a sixtteth or grain in 00,OOe,o0o years.
 Sporting men are not usually credited with taking any great amount of inter- est in scientific inventions. but many or them have been greatly perturbed ana excited. nevertheless, over the introduc- tion of the pendulumchronoscope. Inls curiously named instrument is device for measuring and recording the exact length of time it takes boxer to denver a blow, and it Is averred that, by It's aid the result of a prize fight can De foretold with almost positive certainty. For five years astronomers have been seeking to determine the quantity or so- lar heat reflected by the moons disk but with indifferent results. Some three or four years ago, however, marvel ously delicate instrument called the ther- mopile was invented by Mir c. w. Boys; the well-known scientist, by whose aid 1t has been found possible to approxi- mately solve the hitherto unsolvable problem. The quantity of heat which leaves the moons surface must. or course, he considerable; but so large proportion of 1t Is dissipated in space that it Is estimated that If the entire quantity reaching the earth in twenty four hours could be utilized TOT the pro duction of steam it would be insumclent to drive an ordinary locomotive engine from London to York.
 Measuring Bees Tongues. A machine for accurately measuring the length of bees tongues does not srike the average individual as supplying any par ticular want. But then the average indi- vidual does not keep bees.
 As a matter of fact, in the new apicuI- ture, the length of the insects tongues Is regarded as a matter Of supreme lm- portance The longer the tongue the greater is the bees honey-getttng capa-
 
 meter, is designed to aid the aplarlst' who, by julicious selection, seeks to de- velop long-tongued race.
 It is simply a glass vessel partially filled with sirup, fitted with a lid con, taining numerous small perforations, ana having a floating sc ale to show the helgnt of the liquid when the bees just reach 1t through the holes. It is estimated that an ordinary bee can draw sweets from the depth of about quarter or an men. and that selection can increase It's range a twenty-fifth of an inch.
 Detectives may some day be selected solely on account of the keenness of their olfactory nerves, if Dr. Bethe, an Aus trian scientist, is right in his theory that each member of the human family IS lowered with a distinct and recognizable smell, No one man or woman, among all the millions on earth, he ayers. smells exactly like any other; and ne mas ln- vented a contrivance for registering-or: at all events. ifferenlatlng-each ol these many smells.
 Dr. Bethe's theory is in strict accord with that held by Dr. Jaeger, who main tains that the personal scent Of a man has a distinct ethereal value. pr. Bethe, however, goes further in that he insists that there is characteristic ramlly smell. of which each member Of ram ily more or less partakes. and which they do not lose even when separated rom one another for years.
 Compressed Air "Jags."
 Every one has heard of that extraor- dinary Parisian institution known as the 'claque" Men are hired by the manager of a theatre to applaud at the proper times thereby insuring that, at all events, d new play shall be well received by at least a section of the audience.
 A certain Herr Zimmerman has done away with all this Cor at all events with the necessity for iD by inventing a clap ping machine. The sound to countertelt applause is produced by banging together Ieatherern air bags. A number ot pairs of these bags are slowed away in Varl- ous suita ble places throughout the house. and can be set in motion. by means Of electricity, at the will of the stage man ager. .,
 A Liverpool doctor has noted that men working in a caisson are peculiarly sus- ceptible to the action of stimulants; in fact, a small portion of alcohol sutt1ces to intoxicate them. He further noted that they were instantaneously sobered on coming into theSopen air. Putting the two ideas together. he has hit upon a charming invention-a compressed ar public-house.
 The idea is that man can get de- lightfully drunk and have a rollicking time on a couple of hitters or single small Saotch, and walk out afterwards. sobered instantly and automatically, and feeling absolutely no i'll after effects from his ''debauch.'
 SHE GOT THE PASS