Scientific Ameri
Scientific American Supplement, No. 275, April 9, 1881
作者：Various
体例：题 章数：67
字数：225,415 来源：Project Gutenberg
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章节目录
共 67 题- SCIENTIFIC AMERICAN SUPPLEMENT NO. 275
- NEW YORK, APRIL 9, 1881
- Scientific American established 1845
- TABLE OF CONTENTS.
- The Hotchkiss Revolving Gun
- Floating Pontoon Dock. 2 figures.--Improved floating pontoon dock
- Two Good Lawn Trees
- Cutting Sods for Lawns
- Telephony by Thermic Currents
- WHEAT AND WHEAT BREAD.
- EXPLANATION OF DIAGRAM.
- ANATOMICAL STRUCTURE AND CHEMICAL COMPOSITION OF WHEAT.
- ENVELOPES OF THE BERRY.
- ENVELOPES AND TISSUES OF THE BERRY PROPER.
- ENDOSPERM OR FLOURY PORTION, NOS. 7, 8, 9.
- THE EMBRYO AND THE COATING OF THE EMBRYO.
- THE ORIGIN OF NEW PROCESS MILLING.
- THE MILLING STRUCTURES AND MACHINERY.
- DIRECT FOREIGN TRADE.
- THE GUENON MILK-MIRROR.
- TWO GOOD LAWN TREES.
- H.T.J.
- CUTTING SODS FOR LAWNS.
- F.H.
- HORTICULTURAL NOTES.
- OBSERVATIONS ON THE SALMON OF THE PACIFIC.
- THE RELATION BETWEEN ELECTRICITY AND LIGHT.
- INTERESTING ELECTRICAL RESEARCHES.
- MEASURING ELECTROMOTIVE FORCE.
- C a = (4 m m')/d², with
- TELEPHONY BY THERMIC CURRENTS.
- THE TELECTROSCOPE.
- TRANSMITTER.
- FIGURE 1.
- C. Contacts connected to insulated wires from selenium.
- RECEIVER.
- THE VARIOUS MODES OF TRANSMITTING POWER TO A DISTANCE.
- ESCHER WYSS & CO'S TURBINE.
- SCHMID MOTOR.
- Revolutions per minute 935 919.5 900.5 893
- Total resistance in Siemens' units 2.55 3.82 4.94 6.06
- Intensity in chemical units 17.67 10.99 8.09 6.28
- Intensity in absolute units 2.828 1.759 1.295 1.005
- Work done i²R in kilogrammes 198.6 115.1 80.66 59.62
- Power expended in kilogrammes 301.5 141.0 86.25 83.25
- Efficiency, per cent. 65.9 81.6 93.5 71.6
- GENERAL RESULTS.
- THE HOTCHKISS REVOLVING GUN.
- THALLIUM PAPERS AS OZONOMETERS.
- THE AUDIPHONE IN ENGLAND.
- CONDUCTIVITY OF MOIST AIR.
- FLOATING PONTOON DOCK.
- WEIRLEIGH, BRENCHLEY, KENT.
- ADDENDA.
- D, " " 45 " 76 "
- TAP FOR EFFERVESCING LIQUIDS.
- CHEMICAL SOCIETY, LONDON, JAN. 20, 1881.
- ROSE OIL, OR OTTO OF ROSES.
- A NEW METHOD OF PREPARING METATOLUIDINE.
- THE SCIENTIFIC AMERICAN SUPPLEMENT.
- PUBLISHED WEEKLY.
- TERMS OF SUBSCRIPTION, $5 A YEAR.
- MUNN & CO., PUBLISHERS,
- 37 PARK ROW, NEW YORK, N. Y.
- PATENTS.
- MUNN & CO., 37 PARK ROW, NEW YORK.
- End of Project Gutenberg's Scientific American Supplement No. 275, by Various