Popular science monthly . of the ball. A regulation 56-caliber blank cartridge is used to firethe i^rojectile. Carpenters Level, Compass, Grade-Finder and Periscope CombinedA LEVEL and grade finder has beenplaced on the market which will notonly give the exact distance out of thetrue level but will enable the operatorto ascertain at one glance the true slanton any line or grade, either in degrees,inches or percentages or all at the sametime. It can be mounted on a tripod andused in all forms of grading, laying outroads, landscape gardening, placing ofpipes for drainage, ascertaining fall ofwat
Popular science monthly . of the ball. A regulation 56-caliber blank cartridge is used to firethe i^rojectile. Carpenters Level, Compass, Grade-Finder and Periscope CombinedA LEVEL and grade finder has beenplaced on the market which will notonly give the exact distance out of thetrue level but will enable the operatorto ascertain at one glance the true slanton any line or grade, either in degrees,inches or percentages or all at the sametime. It can be mounted on a tripod andused in all forms of grading, laying outroads, landscape gardening, placing ofpipes for drainage, ascertaining fall ofwater, grade of hills for automobilists,cutting of rafters and laying off andleveling buildings. A spirit le\el glass placed in themiddle of the instrument can be seenfrom all sides if it is placed at an eleva-tion. By noticing the pointer on thedial it will give three guides for of the most novel features of tht-instrument is an adaptation of the peri-scope principle in determining gradesand their If Placed at Sufficient Elevation, a Spirit Level Glass in theMiddle of the Instrument Can Be Seen from All Sides. ThePointing Hand Can Be Plainly Seen Through the Lens Railroading with Motor-Trucks
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License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1872
