AMERICAN AËRONAUTS.BALLOON ENTANGLED IN A TREE.Scattered here and there in this matter-of-fact, utilitarian age of Business one finds instances of that love of daring for its own sake, with an insatiable longing for new scenes and novel sensations, which in the days of chivalry moved the mass of men to put saddle to horse and ride off Somewhere seeking Something—just as occasional trilobites, lonely... more...

DATES AND THE DATE PALM. Even those whose knowledge of the customs of the Orient extends no further than a recollection of the contents of that time-honored story book, the "Arabian Nights," are doubtless aware that, since time immemorial, the date has been the chief food staple of the desert-dwellers of the East. The "handful of dates and gourd of water" form the typical meal and daily... more...

Most useful high explosives, like ammonium nitrate, are enormously violent ... once they're triggered. But they will remain seemingly inert when beaten, burned, variously punished—until the particular shock required comes along.... any years had passed since the original country rock had been broken, cut and set, to form solid pavement for the courtyard at Opertal Prison. And over those years... more...

There has recently been a most interesting discussion at the Literary and Philosophical Society, Manchester, on the above subject. The paper which gave rise to the discussion was by Mr. Brockbank, who detailed many experiments, and ended by stating his opinion that iron does become much weaker, both in its cast and wrought states, under the influence of low temperature; but Mr. Brockbank's paper... more...

THE SCIENTIFIC AMERICAN SUPPLEMENT No. 169, For the Week ending March 29, 1879. Price 10 cents. For sale by all newsdealers. I. ENGINEERING AND MECHANICS.—The Herreshoff Torpedo Boat, recently built at Bristol, R. I., for the British Government. The novelties in the placing of the screw, etc. The Peculiar Boiler. 4 figures.—Improved Hopper Steam Dredger. 2 figures.—The St. Gothard Tunnel.—The... more...

CHAPTER I. Dew, Water, Rain, Snow, Hail, Atmosphere, Wind, Lightning, Thunder, Electricity, Twilight, and the Aurora Borealis. What is Dew? Moisture collected from the atmosphere by the action of cold. During the day, the powerful heat of the sun causes to arise from the earth and water a moist vapor, which, after the sun sinks below the horizon, is condensed by the cold, and falls in the form of dew.... more...

CHAPTER I THE AIMS OF NATURE STUDY Nature Study means primarily the study of natural things and preferably of living things. Like all other subjects, it must justify its position on the school curriculum by proving its power to equip the pupil for the responsibilities of citizenship. That citizen is best prepared for life who lives in most sympathetic and intelligent relation to his environment, and it... more...

"We're almost there, my boy." The big, gray-haired man who would be Lieutenant Dale Hunter's superior—Strategic Service's Special Agent, George Rockford—opened another can of beer, his fifth. "There will be intrigue already under way when this helicopter sets down with us. Attempted homicide will soon follow. The former will be meat for me. You will be meat for the... more...

The Introduction. Whereas there is nothing more necessary for promoting the improvement of Philosophical Matters, than the communicating to such, as apply their Studies and Endeavours that way, such things as are discovered or put in practise by others, it is therefore thought fit to employ the Press, as the most proper way to gratifie those, whose engagement in such Studies, and delight in the... more...

Science needed two thousand years to disentangle the earth's orbital movement from the revolutions of the other planets, and the incomparably more arduous problem of distinguishing the solar share in the confused multitude of stellar displacements first presented itself as possibly tractable a little more than a century ago. In the lack for it as yet of a definite solution there is, then, no... more...