Scientific American Supplement, No. 787, January 31, 1891
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Scientific American Supplement, No. 787, January 31, 1891

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Table of Contents
  • 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.
    • 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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