Popular Science monthly . pick up ATA série de dix navires tu-sable ou almostsix,yards miles. Il aretwenty patchesin sous chaque ballon conditions ordinaires sa gamme isabout sept mille mètres.La lumière elle-même se compose d'thebarrel largehorizontal, qui est un cylindre, dans theback est un miroir qui greatparabolic meas-mesures soixante pouces de diamètre. Lavis du canon est fermé byplate le verre. Entre theglass et le miroir d'un horizontalcarbons arcplays entre deux, capable de développer les quatre-vingt mille bougie-pouvoir. Les carbones sont fedautomatically forabout dernière et cinq heures lorsque

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Popular science monthly . pick up ships ata range of ten thou-sand yards, or almostsix miles. Under There aretwenty patchesin each balloon ordinary conditions its range isabout seven thousand yards.The light itself consists of thebarrel, which is a largehorizontal cylinder, in theback of which is a greatparabolic mirror which meas-ures sixty inches across. Thefront of the barrel is closed byplate glass. Between theglass and the mirror an arcplays between two horizontalcarbons, capable of develop-ing eighty thousand candle-power. The carbons are fedautomatically and last forabout five hours when thelight is in steady use. Each searchlight, a unit initself, is mounted on a truck, by means of which the lightmay be moved to variouspoints. A motor operatingthe moving mechanism of thelight is connected electricallywith the controller which maybe at any distance from thelight. By means of this arrange-ment an officer in an observa-tion tower may manipulatethe light in any direction de-sired by using a series of levers.. Under Tavorablc conditionssearchlight can pick up sh the beam from this giantips almost six miles distant Popiil A Peaceful-Looking Hat WhichMakes You a Walking Arsenal HANDS UP! is not such adisconcerting commandafter all, provided one wearsthe hat shown in the accompany-ing illustration. When the high-wayman gives directions as tohow he would like to have youhand over your aluables, youlook him calmh in the eyes andthen shoot him b simply blow-ing a tube passing from themouth to the trigger of the gunmounted in the top of the hat.Several cartridges are providedin the magazine, so your aimneed not be perfect. Further-more, the recoil from the explo-sions will not unseat the hat.It cocks the hammer for thenext shot and ejects the usedshell. The cartridgesareautomatically fed tothe breech of the gun Monthly 587 .OJUSTING » ^DtTACHABU SPIRCCORD ? n PORT FOR BtMOVINGGUN Jh^ SMELtiTRACK -, 1 dMlf. •(-•AL CROWN CAN Bt -j—J ^SS»! ^3CSi*fll^- l-*TCHtS

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