Scientific Ameri
Scientific American Supplement, No. 787, January 31, 1891
作者：Various
体例：题 章数：71
字数：202,151 来源：Project Gutenberg
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章节目录
共 71 题- SCIENTIFIC AMERICAN SUPPLEMENT NO. 787
- NEW YORK, January 31, 1891
- Scientific American established 1845
- TABLE OF CONTENTS.
- VII. METEOROLOGY.--Note on the Mt. Blanc Meteorological Station
- THE FRENCH IRONCLAD WAR SHIP COLBERT.
- STEAM ENGINE VALVES.
- FIRING POINTS OF VARIOUS EXPLOSIVES.
- STATION FOR TESTING AGRICULTURAL MACHINES.
- WATER SOFTENING AND PURIFYING APPARATUS.
- THE TRISECTION OF ANY ANGLE.
- Let g c = x
- Therefore, from the definition c d = 2x
- We have
- Thus Cy² - 3Cx² = - 4CD²/3. [III.]
- That is
- TEST CARD HINTS.
- CHARLES GOODYEAR.
- THE ELECTROMAGNET.
- BY PROFESSOR SILVANUS P. THOMPSON, D. SC., B.A., M.I.E.E.
- 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.
- FIG. 54.--CURVES OF RISE OF CURRENTS.
- CONNECTING COILS FOR QUICKEST ACTION.
- BATTERY GROUPING FOR QUICKEST ACTION.
- FIG. 55.--CURVES OF RISE OF CURRENT WITH DIFFERENT GROUPINGS OF BATTERY.
- R_{t} = R × e^{(R/L)t} + ( e^{(R/L)t} - 1 )
- TIME CONSTANTS OF ELECTROMAGNETS.
- FIG. 56.--ELECTROMAGNETS OF RELAY, AND THEIR EFFECTS.
- ELECTRIC ERYGMASCOPE.
- A NEW ELECTRIC BALLISTIC TARGET.
- THE OUTLOOK FOR APPLIED ENTOMOLOGY.
- LEGISLATION.
- PUBLICATION.
- CO-OPERATION.
- THE DEPARTMENT AND THE STATIONS.
- STATUS OF OUR SOCIETY.
- SUGGESTION AND COMMENT.
- CONCLUSION.
- POTASH SALTS.
- EXPERIMENTS.
- THE EXPENSE MARGIN IN LIFE INSURANCE.
- ENDOWMENT: $1,000, AGE 30, PAYABLE AT DEATH OR 40
- 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.
- CAN WE SEPARATE ANIMALS FROM PLANTS?
- THE RECOVERY OF SILVER AND GOLD FROM PLATING AND GILDING SOLUTIONS.
- In this way a spent silver bath was found to contain per liter
- A NEW CATALOGUE OF VALUABLE PAPERS
- THE SCIENTIFIC AMERICAN
- ARCHITECTS AND BUILDERS EDITION
- 361 Broadway, New York.
- BUILDING PLANS AND SPECIFICATIONS.
- MUNN & CO., 361 BROADWAY, NEW YORK.
- SCIENTIFIC AMERICAN SUPPLEMENT.
- PUBLISHED WEEKLY.
- USEFUL ENGINEERING BOOKS
- PATENTS.