Scientific American Supplement, No. 620, November 19,1887

It is well known that we can discharge the storage battery _ad libitum_ at the rate of 2 amperes or 200 amperes. I can get out of a storage battery almost any horse power I like...

The time and opportunity has now arrived to assert before all the world the American origin of these universally beneficent inventions. Such a demonstration should be made, if o...

By this means the thread which is passing from one pulley to the other is stretched by an amount equal to the difference of the winding speed of the two pulleys. In the diagram...

Viewed from any standpoint to which we are accustomed, this state of things is so remarkable that we are naturally led to the belief that there must be some special causes which...

The action of the meter was thus: When a current passes through the coil, R, it heats the liquid at the place, thus causing a circulation, the warm liquid ascending while the co...

As will be seen, then, there is a relation between the age of a person and the amplitude of the accommodation of his eyes. If we cannot express a law, we can at least, through s...

[Footnote 2: The period of a wave is the interval of time which elapses between the transits of two successive wave crests past a stationary floating body, the wave crest being...

This process of manufacture is almost identical in principle and in practice with that described and patented by Mr. Joseph Aspden in the year 1824; and though various methods h...

X. SANITATION AND HYGIENE--The Sanitation of Towns--By J. GORDON, C.E.--A presidential address before the Leicester meeting of the Society of Municipal and Sanitary Engineers an...

In order to gain information on this subject, the author has grown cotton under glass, and analyzed it at various stages of its life history. In the early stage of unripeness he...