ed the tunnel. Now pencils of light shooting oflf into space through the crevices quicker cooling, and thus lessening the chances of oxidation it looks a little as if the tunnel were destined to control the in the moon's profile. In 1869 there were but three in our of the metallic sponge. mines.… … ing screw of the same nominal pitch, but on measuring 3 ented an improvement in the Combined Drill and Planter, for feet of the same I found it too short by -jSj of an inch in that The drawing I inclose is designed to show the general which letters patent No. 199,200 were granted to him length. To…
Patents · Improved · Iron · Consists · Patented · Scientific American · Metal · Pulley carrying · Phosphor bronze · Sheet metal · Wrought iron · Emery wheel · Sutro tunnel · Address munn · American export · Fire proof
Internet Archive · Public domain (published before 1931). Free to use for anything.
