cast upon the outer main current into the line, and as this has sufficient is anchored to the bottom, and floats at a pre-determin- shell. Anchored to the mine, and floating above it, at force to pass the resistance and ignite the fuse, the ed depth below the surface of the water. The observa- a… … Firing station and Rapid-fire battery to prevent countermining. Battery »f 8 and 10-inch Field of ground mines, showing submerged electric- range-finders. disappearing guns. contact floating buoys attached. METHOD OF DEFENDING HARBOR CHANNEL WITH SUBMARINE MINES AND BATTERIES OF RAPID-FIRE AND…
Patents · Apparatus · Aluminium · Machine · Scientific American · Ore · Full particulars · Anthracite coal · Port arthur · American april · American supplement · Sheet metal · British patent · Welding aluminium · American supplements
Internet Archive · Public domain (published before 1931). Free to use for anything.
