Early cash recording machine... Early gas masks...

SCIENTIFIC AMERICAN, New York, February 16, 1878  The front page features: "The Cash Recording Machine" with an accompanying article.
Inside has: "Appliances for Supporting Life In Irrespirable Media" or what we might call a gas mask. Also: "Wise's Ice Cream Beater" with text; and much more on the latest inventions of the day.
Sixteen pags, minor repair to an inside page, nice condition.