Periodicals Books

STEAM ENGINE VALVES. By THOMAS HAWLEY. In considering the slide valve in its simple form with or without lap, we find there are certain limitations to its use as a valve that would give the best results. The limitation of most importance is that its construction will not allow of the proper cut off to obtain all the benefits of expansion without hindering the perfect action of the valve in other... more...

COCOS PYNAERTI. This is an acquisition to the dwarf growing palms, and a graceful table plant. It first appeared in the nurseries of M. Pynaert, Ghent, and is evidently a form of C. Weddelliana, having similar character, though, as shown by the accompanying illustration, it is quite distinct. The leaves are gracefully arched, the pinnules rather broader than in the type, more closely arranged, and of a... more...

"TRY, TRY AGAIN." T is a true story that I am going to tell you now. It is about a little boy whose name was William Ross. Having had a present of a pencil, he thought he would make use of it by trying to draw.His first attempts were poor enough. One day, when he had been playing ball with a young friend, he stopped, and, taking out his pencil, began to draw a picture on the wall. "What do... more...

In my presidential address, which I had the pleasure of reading before this society at our first meeting this year, I called attention, somewhat hurriedly, to the results of a few of my experiments on induction, and at the same time expressed a hope that at a future date I might be able to bring them more prominently before you. That date has now arrived, and my endeavor this evening will be to... more...

I. SOUTHWEST ANGLE OF THE DUCAL PALACE, VENICE. Although the Ducal Palace is much larger than the other palaces of Venice, and intended for general civic uses as well as a residence for the Duke or Doge, it follows closely the type already described. It has undergone so many changes since its first foundation in about the year 800 (813 according to Ruskin), having been destroyed five times, and as... more...

FOUNDATIONS IN QUICKSAND. Foundations in quicksand often have to be built in places where least expected, and sometimes the writer has been able to conveniently span the vein with an arch and avoid trouble; but where it cannot be conveniently arched over, it will be necessary to sheath pile for a trench and lay in broad sections of concrete until the space is crossed, the sheath piling being drawn and... more...

THE NEW LABOR EXCHANGE AT PARIS. NEW LABOR EXCHANGE, PARIS. There will soon be inaugurated (probably about the 14th of July) a new establishment that has long been demanded by the laboring population, that is to say, a new labor exchange, the buildings of which, situated on Chateau d'Eau Street, are to succeed the provisional exchange installed in the vicinity of Le Louvre Street. The new... more...

The death of this distinguished man must be recorded. An interesting résumé of his labors by M. Daubree has appeared, from which we take the following facts. After a training in his native town at the Lyceum of Metz, which furnished so many scholars to the Polytechnic school, Delesse was admitted at the age of twenty to this school. In 1839 he left to enter the Corps des Mines. From the beginning of... more...

SOME QUEER RACING-CRAFT. The illustrations on this page are of two varieties of sail-boats that are very common in the vicinity of New York, and quite rare in other parts of the country. They are boats built expressly for speed, and are used almost entirely for racing. The upper of the two pictures represents a regatta of swift sailing craft that, as can be readily seen, would be totally unfit for a... more...

[109] Lavatera Trimestris. Annual Lavatera. Class and Order. Monadelphia Polyandria. Generic Character. Calyx duplex: exterior 3-fidus. Arilli plurimi, monospermi. Specific Character and Synonyms. LAVATERA trimestris caule scabro herbaceo, foliis glabris, pedunculis unifloris, fructibus orbiculo tectis. Linn. Sp. Pl. 974. Hort. Kew. v. 2. p. 452. LAVATERA (althææfolia) foliis infimis... more...