Volume 19, Issue 19
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Features
“On a Piece of Chalk”--A Lecture to Working-Men
The Protuberances on the Sun
Editorial Summary
Sulphur--Its Uses in the Arts
Manufacturing, Mining, and Railroad Items
Recent American and Foreign Patents
Under this heading we shall publish weekly notes of some of the more prominet home and foreign patents
Answer to Correspondents
Some Suggestions on Workingmen's Combinations
To Inventors
Accurate Observation
Something Worth Consideration
Overwork and Underwork
Wealth and its Source--A Graceful Recognition
Ventriloquism
The Manufacture of Straw Board
Manufacture of White Lead
Official Report of Patents and Claims
Issued by the United States Patent Office