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This eBook from the Gutenberg Project consists of approximately 133 pages of information about Scientific American Supplement, No. 821, September 26, 1891.

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Table of Contents
Section	Page

Start of eBook	1
	1
MANUFACTURE OF ROLL TAR PAPER.	3
A PHYSICAL LABORATORY INDICATOR.	16
NEW METHOD OF EXTINGUISHING FIRES	19
SMOKELESS GUNPOWDER.	20
NOISELESSNESS.	28
THE CONSTRUCTION AND MAINTENANCE OF UNDERGROUND CIRCUITS.	29
RAILROADS TO THE CLOUDS.	35
THE MARCEAU.	41
A REVIEW OF MARINE ENGINEERING DURING THE PAST DECADE.[1]	42
BY MR. ALFRED BLECHYNDEN, OF BARROW-IN-FURNESS	42
THE LITTLE HOUSE.	51
THE HYGIENIC TREATMENT OF OBESITY.[1]	55
STILT WALKING.	65
REMAINS OF A ROMAN VILLA IN ENGLAND.	67
GUM ARABIC AND ITS MODERN SUBSTITUTES.[1]	69
MR. CAILLETET’S CRYOGEN.	84
METHOD OF PRODUCING ALCOHOL.	85
SPECTROSCOPIC DETERMINATION OF THE SENSITIVENESS OF DRY PLATES.	86
A NEW CATALOGUE OF VALUE	88
THE SCIENTIFIC AMERICAN	88
BUILDING PLANS AND SPECIFICATIONS.	89
THE SCIENTIFIC AMERICAN SUPPLEMENT.	89
USEFUL ENGINEERING BOOKS	90
PATENTS!	90

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Scientific American Supplement, No. 821, September 26, 1891 from Project Gutenberg. Public domain.