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Knight's Mechanical Encyclopedia (ed. Knight) 4 0 Browse Search
The Daily Dispatch: September 9, 1861., [Electronic resource] 2 0 Browse Search
Rebellion Record: a Diary of American Events: Documents and Narratives, Volume 8. (ed. Frank Moore) 1 1 Browse Search
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make a reconnoissance in that road. He came up with a rebel brigade of cavalry, under Jones, at Morristown, the same command who defeated him at Rogersville. He found the enemy occupying fortifications built by our men before the evacuation of that place. He immediately engaged them, the fight lasting two hours, and drove them out of the town. The enemy lost between forty and drove fifty men. Eight were found dead on the field, and thirteen were left seriously or mortally wounded. Colonel Nicol, of Virginia, was killed. Captain John Holt, of Kentucky, son of Joe Holt, was shot through both thighs. A reconnoissance, the same day, on the Rogersville road came up with the enemy at Moresburgh, nine miles above Bean Station. There was heavy skirmishing for two or three hours. Several were wounded on our side. The loss of the enemy was not known. A reconnoissance yesterday, December eleventh, found no enemy at Morristown, but he was still occupying the ground at Moresburgh.
ject, these images will be caused to revolve around each other. By sawing the piece in two in the proper direction and cementing the two surfaces with Canada balsam, one of these images may be entirely got rid of A piece thus treated constitutes Nicol's prism, and forms the means by which a very large proportion of the observations on polarized light are made. A device of this kind is furnished with all the better class of microscopes. Tourmaline and various other minerals also possess this enabled alike to determine the constitution of the fixed stars and to ascertain the chemical components of the minutest particles of organic matter, opening a field of scientific inquiry the boundaries of which cannot as yet be even imagined. Nicol's prism is used as an adjunct to the microscope in examining the properties of polarized light. Its action depends on the doubly-refracting property of the material (Iceland spar) of which it is composed. On viewing a small object, such as a
A valuable Discovery. --A lorgnette for subaqueous exploration has been prepared by Dr. C. M. Cresson, of Philadelphia. Its peculiarity consists in placing a Nicol's prism of Iceland spar between the object glass and the eye piece, which removes the greater part of the bright light reflected from the surface of water, and thus renders objects beneath water more distinctly visible,