SCIENTIFIC AMERICAN SUPPLEMENT NO. 358

NEW YORK, NOVEMBER 11, 1882

TABLE OF CONTENTS
I.	ENGINEERING AND MECHANICS.--Hydraulic FilteringPress for Treating Oleaginous Seeds.--Details of construction andmanipulation.--15 figures
	Laurent & Collot's Automatic InjectionPump.--6 figures.
	Improved Dredger.--1 figure.--One ton bucketdredge.
	History of the Fire Extinguisher.
	How to Tow a Boat.--1 figure.
	Railways of Europe and America.
	Locomotive Painting. By JOHN S. ATWATER.
	Crackle Glass.--New Process.
	How Marbles are Made.
II.	TECHNOLOGY AND CHEMISTRY.--Drawing RoomPhotography.
	A New Method of Preparing Photographic GelatineEmulsion by Precipitation of the Bromide of Silver. By FRANZSTOLZE.
	Taylor's Freezing Microtome.--1 figure.
	Vincent's Chloride of Methyl Ice Machine. 10figures.-- Longitudinal and transverse sections of freezer.--Halfplan of freezer.--Longitudinal and vertical sections and plan ofpump.-- Details.--Vertical section of the liquefier.
	Carbonic Acid in the Air. By M. DUMAS.
	Influence of Aqueous Vapor on the Explosion ofCarbonic Oxide and Oxygen. By HAROLD B. DIXON.
	Composition of Beers Made Partly from NewGrain.
III.	BOTANY, HORTICULTURE, ETC.--Double Buttercups.--1figure.
	Ligustrum Quihoui.--1 figure.
	Raphiolepis Japonica.--1 figure.
	Rivina Lævis.
	Apples in Store.
IV.	ELECTRICITY, LIGHT, HEAT. ETC.--Before ithappened.-- How the telegraph gets ahead of time.
	The Ader Relay.--By R.G. BROWN.
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