The addition of about fifty per cent. changes the rubber to a hard black substance known as "ebonite," or "hard rubber.".    From Wordnik.com.  [Commercial Geography A Book for High Schools, Commercial Courses, and Business Colleges] Reference

The index of refraction of ebonite was found by Profs.    From Wordnik.com.  [Scientific American Supplement, No. 288, July 9, 1881] Reference

The insulation of the heavy copper connectors is by means of ebonite.    From Wordnik.com.  [On Laboratory Arts] Reference

LIBERTY DOUBLE OPERA-GLASS all copper varnish ebonite, magnifying power.    From Wordnik.com.  [The Stars and Stripes The American Soldiers' Newspaper of World War I, 1918-1919] Reference

The sheet ebonite as it comes from the makers is generally far from flat.    From Wordnik.com.  [On Laboratory Arts] Reference

Opposite to this flat disk there is a brass strip secured to the ebonite cap.    From Wordnik.com.  [Scientific American Supplement, No. 810, July 11, 1891] Reference

For doing this the tuning fork carries two insulating ebonite or ivory strips, B B.    From Wordnik.com.  [Scientific American Supplement, No. 365, December 30, 1882] Reference

A represents an ebonite ring into which the wire coil is cemented by means of paraffin.    From Wordnik.com.  [On Laboratory Arts] Reference

In the study of static electricity, ordinary ebonite combs can be used to great advantage.    From Wordnik.com.  [How Two Boys Made Their Own Electrical Apparatus Containing Complete Directions for Making All Kinds of Simple Apparatus for the Study of Elementary Electricity] Reference

The bath and its contents are allowed to cool together, so that the ebonite cools uniformly.    From Wordnik.com.  [On Laboratory Arts] Reference

A, Fig. 3, circular disk, suspended vertically (made of ebonite or other insulating material).    From Wordnik.com.  [Scientific American Supplement, No. 275, April 9, 1881] Reference

My piles are arranged in ebonite vessels, A, which are flat, as in Fig. 1, or round, as in Fig. 2.    From Wordnik.com.  [Scientific American Supplement, No. 385, May 19, 1883] Reference

The very best quality of ebonite obtainable should be solely employed in constructing electric works.    From Wordnik.com.  [On Laboratory Arts] Reference

At ordinary temperatures ebonite is hard and brittle and breaks with a well-marked conchoidal fracture.    From Wordnik.com.  [On Laboratory Arts] Reference

This is on account of the fact that ebonite sometimes springs a little out of shape when the skin is removed.    From Wordnik.com.  [On Laboratory Arts] Reference

Professor Wright has taken most of his shadow pictures through only the thickness of ebonite in his plate-holder.    From Wordnik.com.  [McClure's Magazine, Vol. 6, No. 5, April, 1896] Reference

A complete cure, however, can only be effected by scraping off the outer layer of ebonite so as to expose a fresh surface.    From Wordnik.com.  [On Laboratory Arts] Reference

It is often necessary to flatten a sheet of ebonite, and of course this is the more easily accomplished the smaller the sheet.    From Wordnik.com.  [On Laboratory Arts] Reference

It is easy to make large tubes out of sheet ebonite by taking advantage of the softening which ebonite undergoes in boiling water.    From Wordnik.com.  [On Laboratory Arts] Reference

For this purpose a bit of sheet glass broken so as to leave a curved edge is very useful, and the ebonite is then scraped like a cricket bat.    From Wordnik.com.  [On Laboratory Arts] Reference

After cleaning the pumice off by means of water and a rag, the final touch may be given by means of vaseline, applied on cloth or on ebonite shavings.    From Wordnik.com.  [On Laboratory Arts] Reference

It is not possible, on the other hand, to use the carpenter's plane with success, for the angle of the tool is too acute and causes the ebonite to chip.    From Wordnik.com.  [On Laboratory Arts] Reference

The seam may be strapped inside or at the ends by bits of ebonite acting as bridges, and the seam itself may be caulked with melted paraffin or anthracene.    From Wordnik.com.  [On Laboratory Arts] Reference

In designing apparatus for laboratory use it is as well to bear in mind that sooner or later the ebonite parts will require to be taken down and scraped up.    From Wordnik.com.  [On Laboratory Arts] Reference

The advantage of using a polished ebonite surface is that such a surface deteriorates more slowly under the influence of light and air than a surface left rough from the tool.    From Wordnik.com.  [On Laboratory Arts] Reference

One end of the stalk is held in ebonite forceps and vibrated.    From Wordnik.com.  [Response in the Living and Non-Living] Reference

Vibration may be imparted to either A or B by means of ebonite clip holders seen at the upper ends A B of the wire.    From Wordnik.com.  [Response in the Living and Non-Living] Reference

Lichtenberg used electrostatic devices to charge the surfaces of various insulating materials such as resin, glass, or ebonite.    From Wordnik.com.  [Red Ice Creations] Reference

The platinoid wire is insulated and the covering of silk that insulates it is wound on the ebonite bobbins just where my finger is.    From Wordnik.com.  [A Portrait of the Artist as a Young Man] Reference

It consists, as shown in figure 8, of a metal plate B having an insulating handle of glass H, and a flat cake of resin or ebonite R.    From Wordnik.com.  [The Story of Electricity] Reference

We had forty ski-poles, with ebonite points.    From Wordnik.com.  [The South Pole~ Plan and Preparations] Reference

His fingers pressed the ebonite disc.    From Wordnik.com.  [The Submarine Hunters A Story of the Naval Patrol Work in the Great War] Reference

F, and carrying a concentric disk of ebonite, H.    From Wordnik.com.  [Scientific American Supplement, No. 531, March 6, 1886] Reference