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This eBook from the Gutenberg Project consists of approximately 111 pages of information about Scientific American Supplement No. 819, September 12, 1891.

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Table of Contents
Section	Page

Start of eBook	1
	1
MUSICAL INSTRUMENTS: THEIR CONSTRUCTION AND CAPABILITIES.	7
HOW GAS CYLINDERS ARE MADE.	24
HISTORICAL DEVELOPMENT OF THE HORSESHOE.	26
SHEET GLASS FROM MOLTEN METAL.	35
WELDLESS STEEL CHAINS.	35
AN ENGLISH STEAM FIRE ENGINE.	42
THE SYSTEM OF MILITARY DOVE COTES IN EUROPE.[1]	43
THE ISLE OF MAN TWIN SCREW STEAMER TYNWALD.	46
THE TREATMENT OF REFRACTORY ORES.	49
REFINING SILVER BULLION.	50
A CASE OF DROWNING, WITH RESUSCITATION.	54
THE STORY OF THE UNIVERSE.[1]	58
HERSCHEL’S THEORY.	59
THE NEBULAR HYPOTHESIS.	60
OTHER SPECULATIONS.	60
HELMHOLTZ’S DISCOVERY.	61
LOOKING BACKWARD.	61
THE MOTIONS OF THE STARS.	62
ALGOL AND SPICA.	63
THE VALUE OF PHOTOGRAPHY.	64
TWO EXAMPLES.	64
A PHOTOGRAPHIC CHART.	65
A DELICATE OPERATION.	65
PHOTOGRAPHIC REVELATIONS.	65
THE STORY OF THE HEAVENS.	66
THE WORK OF THE FUTURE.	67
CLIMATIC CHANGES IN THE SOUTHERN HEMISPHERE.	67
AMMONIA.	69
A NEW CATALOGUE OF VALUABLE PAPERS	72
THE SCIENTIFIC AMERICAN	72
BUILDING PLANS AND SPECIFICATIONS.	73
	73
USEFUL ENGINEERING BOOKS	74
PATENTS!	74

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Scientific American Supplement No. 819, September 12, 1891 from Project Gutenberg. Public domain.