SCIENTIFIC AMERICAN SUPPLEMENT NO. 822

NEW YORK, October 3, 1891

Scientific American Supplement. Vol. XXXII, No. 822.

Scientific American established 1845

Scientific American Supplement, $5 a year.

Scientific American and Supplement, $7 a year.

TABLE OF CONTENTS.
I.	ANTHROPOLOGY.—The Study of Mankind.—A review of Prof.Max Muller's recent address before the British Association.
II.	CHEMISTRY.—Standards and Methods for the Polarimetric Estimationof Sugars.—A U.S. internal revenue report on the titularsubject.—2 illustrations.
	The Formation of Starch in Leaves.—An interesting examinationinto the physiological role of leaves.—1 illustration.
	The Water Molecule.—By A. GANSWINDT.—A very interestingcontribution to structural chemistry.
III.	CIVIL ENGINEERING.—Demolition of Rocks under Waterwithout Explosives.—Lobnitz System.—By EDWARD S. CRAWLEY.—Amethod of removing rocks by combined dredging andramming as applied on the Suez Canal.—3 illustrations.
IV.	ELECTRICITY.—Electrical Standards.—The English Board ofTrade commission's standards of electrical measurements.
	The London-Paris Telephone.—By W.H. PREECE, F.R.S.—Detailsof the telephone between London and Paris and its remarkablesuccess.—6 illustrations.
	The Manufacture of Phosphorus by Electricity.—A new industrybased on dynamic electricity.—Full details.
	The Two or Three Phase Alternating Current Systems.—ByCARL HERING.—A new industrial development in electricityfully described and graphically developed.—15 illustrations.
V.	GEOGRAPHY AND EXPLORATION.—The Grand Falls ofLabrador.—The Bowdoin College exploring expedition and its adventuresand discoveries in Labrador.
VI.	MECHANICAL ENGINEERING.—Improved Changeable SpeedGearing.—An ingenious method of obtaining different speeds atwill from a single driving shaft.—2 illustrations.
	Progress in Engineering.—Notes on the progress of the lastdecade.
VII.	MEDICINE AND HYGIENE.—Eyesight.—Its Care during Infancyand Youth.—By L. WEBSTER FOX, M.D.—A very timelyarticle on the preservation of sight and its deterioration amongcivilized people.
	The Use of Compressed Air in Conjunction with Medicinal Solutionsin the Treatment of Nervous and Mental Affections.—ByJ. LEONARD CORNING.—The enhancement of the effects of remediesby subse ... BU KİTABI OKUMAK İÇİN ÜYE OLUN VEYA GİRİŞ YAPIN! Sitemize Üyelik ÜCRETSİZDİR!