Volume 55, Issue 4
You are currently logged out. Please sign in to download the issue PDF.
Features
The Basic Steel Process
Torpedo Boats in the Gale
Efficiency of Small Water Motors
Railway Track
Improved Windmill
Improved Whiffletree
Wire Painting Machine
Improved Desk Attachment
Anti-Friction Bearing
Making Fine Guns for Sporting Purposes
Banjo Frame
Photographic Notes - July 24, 1886
Pinhole camera.
The Petroleum Oil wells of Baku
Polarized light
Apparatus for exhibiting wide angled crystals