SCIENTIFIC AMERICAN SUPPLEMENT NO. 787
NEW YORK, January 31, 1891
Scientific American Supplement. Vol. XXXI., No. 787.
Scientific American established 1845
Scientific American Supplement, $5 a year.
Scientific American and Supplement, $7 a year.
THE FRENCH IRONCLAD WAR SHIP COLBERT.
STEAM ENGINE VALVES.1
RIDING CUT-OFF VALVES—PECULIARITIES AND MERITS OF THE DIFFERENT STYLES.
FIRING POINTS OF VARIOUS EXPLOSIVES.
STATION FOR TESTING AGRICULTURAL MACHINES.
WATER SOFTENING AND PURIFYING APPARATUS.
THE TRISECTION OF ANY ANGLE.
TEST CARD HINTS.
CHARLES GOODYEAR.
THE ELECTROMAGNET.1
III.
RESEARCHES OF PROFESSOR HUGHES.
POSITION AND FORM OF ARMATURE.
POLE PIECES ON HORSESHOE MAGNETS.
CONTRAST BETWEEN ELECTROMAGNETS AND PERMANENT MAGNETS.
ELECTROMAGNETS FOR MAXIMUM TRACTION.
ELECTROMAGNETS FOR MAXIMUM RANGE OF ATTRACTION.
ELECTROMAGNETS OF MINIMUM WEIGHT.
A USEFUL GUIDING PRINCIPLE.
ELECTROMAGNETS FOR USE WITH ALTERNATING CURRENTS.
ELECTROMAGNETS FOR QUICKEST ACTION.
CONNECTING COILS FOR QUICKEST ACTION.
BATTERY GROUPING FOR QUICKEST ACTION.
TIME CONSTANTS OF ELECTROMAGNETS.
SHORT CORES versus LONG CORES.
ELECTRIC ERYGMASCOPE.
A NEW ELECTRIC BALLISTIC TARGET.
THE OUTLOOK FOR APPLIED ENTOMOLOGY.1
LEGISLATION.
PUBLICATION.
CO-OPERATION.
THE DEPARTMENT AND THE STATIONS.
STATUS OF OUR SOCIETY.
SUGGESTION AND COMMENT.
CONCLUSION.
POTASH SALTS.1
EXPERIMENTS.
THE EXPENSE MARGIN IN LIFE INSURANCE.
THE FLOOD AT KARLSBAD.
THEATRICAL WATER PLAYS.
SCIENCE IN THE THEATER.
NEWER PHYSIOLOGY AND PATHOLOGY.
THE COMPOSITION OF KOCH'S LYMPH.
WHAT PROFESSOR KOCH SAYS IT IS, AND WHAT IT CAN DO.
(By Cable to the Medical Record.)
BERLIN, January 15, 1891.
CAN WE SEPARATE ANIMALS FROM PLANTS?
THE RECOVERY OF SILVER AND GOLD FROM PLATING AND GILDING SOLUTIONS.
A new Catalogue of Valuable Papers
THE SCIENTIFIC AMERICAN
Architects and Builders Edition
Building Plans and Specifications.
Scientific American Supplement.
Useful Engineering Books
PATENTS.
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