Scientific American Supplement, No. 803, May 23, 1891

But Watt did not stop here. There still remained for him the no less important and the, in some senses, still more imposing, work of finding employment for the new servant of ma...

The expanded wings, Fig. 12, male, measure about two inches, are white above, with the base dusky. Both sexes have the apex black and a black spot a little beyond the middle, an...

Most of the breeds of dogs, especially those of modern creation, are the work of man, and have been obtained by intercrossing older breeds and discarding all the animals that de...

Figures show that the consumption of iron in general construction--other than railroads--in this country has grown from a little more than a million and a half of tons in 1879 t...

II. CHEMISTRY.--An Apparatus for Heating Substances in Glass Tubes under Pressure.--By H. PEMBERTON, Jr.--A simple apparatus for effecting this purpose, avoiding risk of persona...

The following may be taken as a brief summary of Professor Riedler's conclusions: Recent improvements in central station practice have resulted in an increased efficiency of abo...

In Fig. 7, as in Fig. 1, DT is tangent at T to the given circle whose center is O, and at t to the circle about C whose diameter is AB, the major axis. Since DTO is a right angl...

When we come to back the plates, their power to resist penetration becomes greater, and our formula changes. The Gavre formula, given above, is used to determine the velocity ne...

In the earliest stages of the Popp system in Paris it was recognized that no good results could be obtained if the air were allowed to expand direct into the motor; not only did...

(1) One four-inch wrought iron pipe, eighteen inches out to out, with usual thread on each end. At about nine inches from either end this pipe is drilled and tapped for a one-in...