| TABLE OF CONTENTS. |
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| | PAGE. |
| I. | [AGRICULTURE.—How to Raise Turkeys.—A collection of hintsand suggestions on the raising of the delicate fowls, so often thecause of trouble to farmers.] | 11364 |
| [Pear Duchesse D'Angouleme.—The history of the famous peartree, with hints as to its culture and general treatment.] | 11362 |
| II. | [BIOLOGY.—Development of the Embryo.—A note of some interestingbiological researches.—By Prof. Preyer, of Berlin.] | 11365 |
| [The "Hatchery" of the Sun Fish.—A curious incident in thelife history of the common sunfish.—1 illustration.] | 11363 |
| III. | [CHEMISTRY.—On Allotropic Forms of Silver.—By M. CareyLea.—A continuation of this paper, containing one of the mostimportant researches in the history of silver, with statement ofinteresting results attained.] | 11361 |
| [On the Occurrence of Paraffine in Crude Petroleum.—A valuablecontribution to the history of paraffine, with reference to petroleumand ozokerite.] | 11361 |
| [Turpentine and its Products.—By Edward Davies.—A resumeof the work done by chemists in the turpentine products.—Thedifferent compounds produced therefrom.] | 11361 |
| IV. | [ELECTRICITY.—Electric Lighting at the Paris Exhibition.—TheOerlikon works.—A very exhaustive exhibition of electric apparatusdescribed and illustrated.—12 illustrations.] | 11356 |
| [Magnetism in its Relation to Induced Electromotive Force andCurrent.—By Elihu Thomson.—A most impressive paper, bringingthe obscure laws of magnetic induction within the understandingof all without the application of mathematics.—12 illustrations.] | 11354 |
| [The Ader Flourish of Trumpets.—One of the curiosities intelephony from the Paris exhibition, by which sounds are transmittedto a large audience.—4 illustrations.] | 11358 |
| [The Electric Motor Tests on the New York Elevated Railroad.—Abstractsof tests which were recently made of the Daft motoron the elevated railroad of this city.] | 11353 |
| V. | [ETHNOLOGY.—Ancient Lake Dwellings.—Interesting abstract ofwhat is known about lake dwellings, the history of their construction,and the "finds" made on the sites by archæologists.] | 11363 |
| VI. | [FORESTRY.—Succession of Forest Growths.—A valuable paperon forestry, treating of the evils done by man and a plea for thenecessity of intelligent treatment of our woods.] | 11362 |
| VII. | [HYGIENE AND MEDICINE.—Acetic Acid as a Disinfectant.—Useof acetic acid in septic medical cases as a substitute for carbolicacid and bichloride of mercury.] | 11365 |
| [Counter-Irritation in Whooping Cough.—By G.F. Inglott,M.D.—Application of irritants to the skin for curing the paroxysmsof whooping cough.] | 11365 |
| [On the Health Value to Man of the So-called Divinely BeneficentGift, Tobacco.—By J.M.W. Kitchen, M.D.—The evils toman and to the soil.—A formidable series of accusations wellexpressed.] | 11365 |
| [Water as a Therapeutical Agent.—By F.C. Robinson, M.D.—Aninteresting resume of different applications of water in therapeutics.—Suggestionsof use for all households.] | 11364 |
| VIII. | [MILITARY ENGINEERING.—Gibraltar.—A history of thisimportant strategic position and of the different sieges the fortresshas undergone.] | 11352 |
| [Gibraltar and Neighborhood.—A consular report on the statisticsof the famous military station.] | 11352 |
| [The Defense of Gibraltar—Experimental Naval and MilitaryOperations.—Interesting series of operations recently carried outunder the shadow of the historic rock.—1 illustration.] | 11352 |
| IX. | [NAVAL ENGINEERING.—Clark's Gyroscopic Torpedoes.—Arecent torpedo, in which all the possible parts are made to rotate.—2illustrations.] | 11353 |
| [The First Steamboat on the Seine.—The Marquis de Jouffroy'ssteamer of 1816.—1 illustration.] | 11353 |
| [The Franz Josef I., New War Ship.—Details of the dimensionsof the new Austrian ship.—Her armament, speed, armor, etc.] | 11353 |
| X. | [PHOTOGRAPHY.—Orthochromatic Photography.—By Oscar O.Litzkow.—The last developments in this interesting branch ofphotographic art, with formulæ.] | 11360 |
| [Platinotype Printing.—A description of the most advancedmethod of conducting the platinum print process.] | 11360 |
| XI. | [PHYSICS.—Iridescent Crystals.—By Lord Rayleigh.—An abstractof a lecture by the distinguished physicist, detailing some interestingexperiments applicable to the colored reflection observedin crystals of chloride of potash.—1 illustration.] | 11366 |
| [Transmission of Pressure in Fluids.—By Albert B. Porter.—Anapparatus for illustrating the laws of transmission of pressurein fluids, suitable for lecture purposes.—1 illustration.] | 11362 |
| XII. | [TECHNOLOGY.—Notes on Dyewood Extracts and Similar Preparations.—ByLouis Siebold.—The recent development in thepreparation of dyewood extracts, with notes of their adulterations.] | 11359 |
