SCIENTIFIC AMERICAN SUPPLEMENT NO. 841
NEW YORK, FEBRUARY 13, 1892
Scientific American Supplement. Vol. XXXIII, No. 841.
Scientific American established 1845
Scientific American Supplement, $5 a year.
Scientific American and Supplement, $7 a year.
TABLE OF CONTENTS.
I.
ANTHROPOLOGY.—Investigation of a Mound near JeffersonCity, Mo.—By A.S. LOGAN.—Prehistoric remains from the banksof the Missouri River
II.
BIOLOGY.—New Observations on the Language of Animals.—ByM. DE LACAZE DUTHIERS.—A lengthy examination of some factsin the language of animals, including birds and quadrupeds
III.
BOTANY.—Electricity in Agriculture.—By CLARENCE D. WARNER.—Theeffect of currents of electricity upon the germination ofseeds.—Interesting experiments detailed, which can be easily repeated
Electricity in Horticulture.—The effect of the electric light onvegetation, availability it may possess for the gardener
Pentapterygium Serpens.—A Himalayan flowering plant introducedin England about ten years ago.—2 illustrations
The Perforation of Flowers.—What insects do to promote thepropagation of plants by perforating the flowers in search of honey.—16 illustrations
IV.
CHEMISTRY.—A New Laboratory Process for Preparing HydrobromicAcid.—By G.S. NEWTH.—Simple synthesis of hydrogenand bromium
Boron Salts.—Boron sulphides and selenides and silicon selenide
Detection of Peanut Oil in Olive Oil.—A practical laboratorytest for the above adulteration
Hydroxylamine.—Recent preparation of this compound and itsproperties
New Boron Compounds.—Compounds of boron, phosphorus, andiodine recently prepared by M. MOISSAN
Sapotin, a New Glucoside.—By GUSTAVE MICHAUD.—Preparationof a new glucoside from almonds and other sources
V.
CIVIL ENGINEERING.—Completion of the Mersey Tunnel Railway.—Thepenetration of the bed of the Mersey River by a tunnelat the rate of 150 feet per week.—Details of the work
VI.
EDUCATIONAL SCIENCE.—Chinese Competitive Examinations.—Interestingdetails of the famous examinations of China.—Fatalconsequences to overworked competitors
VII.
ELECTRICAL ENGINEERING.—High Speed Engine and Dynamo.—Ahigh speed
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