Scientific American Supplement, No. 623, December 10, 1887

Time was that the surplus of unskilled labor was used on a mercantile basis to reduce wages to such an extent that it was almost impossible to rear a well nurtured, much less a...

The present system owes its efficiency to the formation of _a complete and constantly closed magnetic circuit_, moving with the vehicle and completed through the two driving axl...

We represent herewith a sanitary train that was very successfully used during the prevalence of an epidemic of _sudor Anglicus_ in Poitou this year. It consisted of a movable st...

I have here two half-plate films exposed at 8:30 A.M. to-day, one with five and one with six seconds' exposure, subject chiefly middle distance. I take 90 minims A, 10 minims D,...

In the note on the constitution of alkaloids in a recent issue, we referred more especially to what we may term the less highly organized bases. Most of our knowledge, as we now...

If the work was done where they had a lathe large enough to swing a pair of wheels, they were pressed off but half an inch, the wheels swung in the lathe, the axles turned back...

The electric current as a means of increasing the tractive adhesion of railway motors and other rolling contacts.--By ELIAS E. RIES--A full review of this important subject, wit...

In form, the algæ differ greatly from filaments or masses of cells; they live in the water and cover damp surfaces of rocks and wood. In these they are remarkable for their rami...

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It will be necessary to say a few words as to the way in which soundings are made at sea. When the bottom consists of sand, mud, or other loose matter, it is easy enough to brin...