Scientific American Supplement, No. 561, October 2, 1886

We may sum up by saying that the hydraulic propeller is less efficient than the screw, because it does more work on the water and less on the boat; and that the boat in turn doe...

The following tools, which are few and inexpensive, will be required: A pair of clams (Fig. 4), cost 1s. 6d.; knife (Fig. 5), 6d.; half dozen awl blades, ½d. each; three or four...

When it is desired to make a determination of nitric acid, 100 c.c. of solution No. 1 are measured off, and as much of it as may be convenient is poured into the tubes, E, E, to...

Fig. 4 shows a similar arrangement to that above described, but reversed; the gas and air being previously heated by the products of combustion. The two pipes, D, lead the gas t...

II. CHEMISTRY.--Probable Isolation of Fluorine.--Decomposition of hydrofluoric acid by an electric current.--By M.H. MOISSAN.--Production of a new body, possibly fluorine, or pe...

Cow-hide for the outside is sold at 1s. 8d. per square foot, but the leather sellers frequently have pieces large enough for making a bag which they will sell at a slight reduct...

Another mistake is often made in regard to the cause of certain prismatic colors that are sometimes, in a striking degree, produced by otherwise good objectives. According to th...

Mr. J. Campbell remarked that at present the great American liners had only the ordinary compound engines, and he thought that, instead of converting them to triple expansion, t...

+---------------------+---------------------------------- SUBSTANCE | IMPURITIES | TESTS. | POSSIBLY PRESENT. | ------------------+---------------------+------------------------...

Next we must attack the extravagant furnace, and increase its area and reduce the depth of the bed of coal. The difficulty of making this change seemed to me to be removed, on e...

+----------+---------+-----------+-----------+-----------+ Name |Indicated | Speed. | Block | Midship | Prismatic | | H.P. | |coefficient| section | midship | | | | |coefficient...

Only two plants are on record among the floriculturists as having bloomed in New York State. Thirty years ago, a century plant, of which the Casey aloe was a slip, flowered in t...