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قراءة كتاب Scientific American Supplement, No. 508, September 26, 1885

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Scientific American Supplement, No. 508, September 26, 1885

Scientific American Supplement, No. 508, September 26, 1885

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دار النشر: Project Gutenberg
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SCIENTIFIC AMERICAN SUPPLEMENT NO. 508

NEW YORK, SEPTEMBER 26, 1885

Scientific American Supplement. Vol. XX.*, No. 508.

Scientific American established 1845

Scientific American Supplement, $5 a year.

Scientific American and Supplement, $7 a year.

TABLE OF CONTENTS.
  PAGE.
I. CHEMISTRY AND METALLURGY.—The Cowles Electric Smelting Process. 5 figures. 8113
On the Electrical Furnace and the Reduction of the Oxides of Boron, Silicon, Aluminum, and other Metals by Carbon.—By Eugene H. Cowles, Alfred H. Cowles, and Charles F. Mabery. 8112
Chemical Action of Light. 8117
Eutexia.—Cryohydrates.—Eutectic salt alloys and metal alloys. 8117
Chinoline. 8118
Method of Rapid Estimation of Urea. 1 figure. 8118
Assay of Earthenware Glaze. 8112
II. ENGINEERING AND MECHANICS.—Deep Shafts and Deep Mining. 8104
Sinking of the Quievrechain Working Shaft.—Numerous figures. 8108
On the Elementary Principles of the Gas Engine.—An interesting paper read before the Gas Institute by Mr. Denny Lane, of Cork, and discussion following. 8109
M. Meizel's Reciprocating Exhauster. 8112
Automatic Siphon for Irrigation. 1 figure. 8113
III. ELECTRICITY, TELEGRAPHY, ETC.—Optical Telegraphy.— Cryptography.—Preservation of Telegrams.—The projector in optical telegraphy.—Use of balloons. 4 figures. 8114
A New Style of Submarine Telegraph. 4 figures. 8115
A New Circuit Cutter. 2 figures. 8115
New Micro Telephonic Apparatus. 5 figures. 8116
Messrs. Kapp and Crompton's Measuring Instruments. 5 figures. 8116
IV. GEOLOGY, ETC.—Permeability of Sand Rock.—By F.H. Newell. 8103
The Grotto of Gargas, in the Pyrenees.—Paleontological remains found therein. 2 engravings. 8103
Remarkable Wells and Caverns in Yucatan.—By Alice D. Le Plongeon. 8105
V. NATURAL HISTORY.—The Cabbage Butterfly and the Peacock Butterfly. 8105
VI. BOTANY AND HORTICULTURE.—The Bhotan Cypress (Cupressus torulosa).—With engraving. 8106
The Pitcher Plant. 8106
What is a Plant? 8106
Camellias.—Culture of the same. 8106
Arisæma Fimbriatum.—Leaf, spathe, and floral details.—With engraving. 8107
VII. MISCELLANEOUS.—Striking a Light with Bamboo. 8107
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