Scientific American Magazine Vol 63 Issue 24

Scientific American Magazine

Volume 63, Issue 24

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Features

A School of Ship Building--The Objects and Ideas of Its Founder

The Centennial of the United States Patent System

An Improved Copy Holder

A Regulator for Dynamos and Motors

A Convenient Ear Trumpet

An Improved Velocipede

A Device to Block Cars on a Grade

An Improved Metallic Railway Tie

Railroad Sleepers Arranged in Pairs

An Improved Pipe or Flue Cutter

The Hudson River Bridge

A Pug Mill for Brick Makers

A Pipe Cutter, Beader, and Expander

The Manufacture of Salt at Syracuse, N. Y.

The Sebae or Silk Cotton Tree

J. F. Coonley

The Codonophone

The Belt Problem

An Instantaneous Shutter for Hand Cameras

A Nautico-Terrestrial Velocipede

Departments

Correspondence- December 13, 1890

Recently Patented Inventions- December 13, 1890

Business and Personal- December 13, 1890

Notes & Queries- December 13, 1890

To Inventors- December 13, 1890

New Books and Publications- December 13, 1890

Index of Inventions- December 13, 1890