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

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...

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...

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...

__________________________________________________________________________ | | | | | | M. & | L. & | E.T., V.|Average. | | O. R.R. | N. R.R. |& G. R.R.| | |_________|_________|_...

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,...

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...

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...

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...

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...

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...