SCIENTIFIC AMERICAN SUPPLEMENT NO. 303

NEW YORK, OCTOBER 22, 1881

Scientific American Supplement. Vol. XII, No. 303.

Scientific American established 1845

Scientific American Supplement, $5 a year.

Scientific American and Supplement, $7 a year.

TABLE OF CONTENTS
I.	ENGINEERING AND MECHANICS.--New Eighty-ton SteamHammer at the Saint Chamond Works, France.--7 figures.--Elevationof hammer.--Profile-- Transverse section.--Profile view offoundation, etc.--Plan of plant.--General plan of the forgingmill.--Details of truss and support for the cranes.
	Great Steamers.--Comparative details of theServia, the City of Rome, the Alaska, and the GreatEastern.
	Improved Road Locomotive.--2 figures.--Side andend views
	American Milling Methods. By ALBERT HOPPIN.--Tenyears' progress.--Low milling.--Half high milling.--Highmilling.--Important paper read before the Pennsylvania StateMillers' Association.
	Machine for Dotting Tulles and other LightFabrics.--3 figures.
II.	TECHNOLOGY AND CHEMISTRY.--The Reproduction andMultiplication of Negatives. By ERNEST EDWARDS.
	A New Method of Making Gelatine Emulsion. By W. K.BURTON.
	The Pottery and Porcelain Industries ofJapan.
	Crystallization Table.
	The Principles of Hop Analysis. By Dr. G. O.CECH.
	Water Gas.--A description of apparatus forproducing cheap gas, and some notes on the economical effects ofusing such gas with gas motors, etc.--By J. EMERSONDOWSON.
	On the Fluid Density of Certain Metals. ByProfessors CHANDLER ROBERTS and T. WRIGLESON.
III.	PHYSICS, ELECTRICITY, ETC.--Electric Power.--Thenature and uses of electricity.--Electricity vs. steam.
	On the Method of Obtaining and Measuring VeryHigh Vacua with a Modified Form of Sprengel Pump. By Prof OGDEN N.ROOD.--4 figures.-- Apparatus for obtaining vacua of one fourhundred-millionth of anatmosphere--Construction.--Manipulation.--Calculations.--Results
IV.	ART, ARCHITECTURE, ETC.--Old Wrought Iron Gates,Guildhall. Worcester, England. 1 figure.
	The French Crystal Palace, Park of St. Cloud,Paris. 1 full page illustration.
	Suggestions in Architecture. A CastellatedChateau. Perspective and plan. C ... BU KİTABI OKUMAK İÇİN ÜYE OLUN VEYA GİRİŞ YAPIN! Sitemize Üyelik ÜCRETSİZDİR!