Popular science monthly . )istol grip and triggersimilar to that on .dl makes of revolvers. T h cshutterof t hecamerais opera-ted by pulling the trigger. TIk ])hotogra]iher|)()inls the ajiparatus with dead accuracyat the object to be photographed and witlia slight movement of his finger takes the]>icture. The two focusing frames,which are nothing more than commongun-sights ill disguise, enable thel)liologra|)her to le\cl liis camera i-ertaint>. rile length of the camera box is a littleuiulir two feet, and its weight aboutihirteiii pounds. Tlu Irench ha\etested the photograi
Popular science monthly . )istol grip and triggersimilar to that on .dl makes of revolvers. T h cshutterof t hecamerais opera-ted by pulling the trigger. TIk ])hotogra]iher|)()inls the ajiparatus with dead accuracyat the object to be photographed and witlia slight movement of his finger takes the]>icture. The two focusing frames,which are nothing more than commongun-sights ill disguise, enable thel)liologra|)her to le\cl liis camera i-ertaint>. rile length of the camera box is a littleuiulir two feet, and its weight aboutihirteiii pounds. Tlu Irench ha\etested the photograi)hic capabilities ofthe apparatus by experimenting with itill their own aerojilanes. were i)roduced. In son)e casesclear and distinct i)hotogra]ihs of mili-tary value were at .dtitudes ofu|)wards nf -Ix thousand feet. is liu onh one of its kind to fallIII lilt of the French. Popular Science Montlihj 409 The End of the Cleaner IsMoistened by the EnclosedBenzine a Drop at a Time. The device is presseddown on the glove. Thisdrives in the felt andpushes down the disk, com-pressing the sponge andcausin-j licjuid to passthrough a small hole intothe tube and out througha second hole. In the mid-file there is a fixed metalpiece which separates thedevice into two similar halves. Twostrong springs separate the parts. Outside CoveringAbsorbent MaterialBenzine Outlet Movable DiskSpongeBenzine InletStationary DiskSpringMovable Disk Cleaning Gloves Economicallywith Benzine A GLOVE cleaner which contains itsown benzine is illustrated. A metaltube holds a sponge in its upper part andfelt or some other porousmaterial in its lower ^--^ \part. The whole ^-^^^^ II \is surroundedby a cov-ering offabric. Good-By to the Pin-Boys in theBowling-Alley ANEW kind of bowling-alley hasbeen invented bj Joseph M. West,Rockport, Missouri. The bowler throwsa ball suspended from a trolley carriagewhich travels on an elevated is merely necessary to pull
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1872
