SCIENTIFIC AMERICAN SUPPLEMENT NO. 531

NEW YORK, MARCH 6, 1886

Scientific American Supplement. Vol. XXI, No. 531.

Scientific American established 1845

Scientific American Supplement, $5 a year.

Scientific American and Supplement, $7 a year.


TABLE OF CONTENTS.
I.CHEMISTRY AND METALLURGY.--Annatto.-Analyses ofthe same.--By WM. LAWSON
Aluminum.--By J.A. PRICE.--Iron the basis ofcivilization.-- Aluminum the metal of the future.--Discovery ofaluminum.--Art of obtaining the metal.--Uses andpossibilities
II.ENGINEERING AND MECHANICS.--The Use of Iron inFortification. --Armor-plated casements.--The Schumann-Grusonchilled iron cupola.--Mougin's rolled iron cupola.--With full pageof engravings
High Speed on the Ocean
Sibley College Lectures.--Principles and Methodsof Balancing Forces developed in Moving Bodies.--Momentum andcentrifugal force.--By CHAS.T. PORTER.--3 figures
Compressed Air Power Schemes.--By J.STURGEON.--Several figures
The Berthon Collapsible Canoe.--2engravings
The Fiftieth Anniversary of the Opening of theFirst German Steam Railroad.--With full page engraving
Improved Coal Elevator.--With engraving
III.TECHNOLOGY.--Steel-making Ladles.--4figures
Water Gas.--The relative value of water gas andother gases as Iron-reducing Agents.--By B.H.THWAITE.--Experiments.--With tables and 1 figure
Japanese Rice Wine and Soja Sauce.--Method ofmaking
IV.ELECTRICITY, MICROSCOPY, ETC.-Apparatus fordemonstrating that Electricity develops only on the Surface ofConductors.--1 figure
The Colson Telephone.--3 engravings
The Meldometer.--An apparatus for determining themelting points of minerals
Touch Transmission by Electricity in theEducation of Deaf Mutes.--By S. TEFFT WALKER.--With 1figure
V.HORTICULTURE.--Candelabra Cactus and theCalifornia Woodpecker.--By C.F. HOLDER.--With 2 engravings
How Plants are reproduced.--By C.E. STUART.--Apaper read before the Chemists' Assistants' Association
VI.MISCELLANEOUS--The Origin of Me
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