Biology Lab Microscopes

Biology Lab Microscopes - Microscope for Dissection

admin — Mon, 28 May 2007 06:24:58 +0000

An arrangement devised by the late Mr. Quekett, for a dissecting microscope, represented, is one of value and convenience.

The dissecting microscope is made by Mr. Ladd of Beck Street, and is furnished by him with three magnifiers, namely, an inch, and half-inch, ordinary lenses, and a quarter-inch Coddington; these will be found to be the powers most useful for the purposes to which this instrument is specially adapted.

The lenses mirror, condenser, vertical stem, all fit into hollows cut for their reception on the under side of the stage, and are then covered and kept in place by the side flaps: so that, when packed together, and the flaps kept secure by an India rubber band, the instrument is very conveniently portable.

The size and firmness of the stage afford great facilities for dissection, and other scientific investigations.

Biology Lab Microscopes - Parts and Functions of Simple Biology Lab Microscopes

admin — Mon, 28 May 2007 06:24:21 +0000

Another highly-useful and more complete simple biology lab microscope was contrived by Mr. Valentine, and made for him by Mr. Ross in 1831. It is thus described by the latter gentleman, and is represented. It is supported on a firm tripod, made of bell-metal, the feet of which, are made to close up for the purpose of packing it in a box. The firm rises from the tripod, and carries the stage; this is further strengthened by the two supports. From the pillar a triangular bar, and a triangular tube, is moved up and down by a screw, having fifty threads in the inch, and turned by a large milled head, which is situated at the base of the pillar: this is the fine adjustment. (more…)

Biology Lab Microscopes - The Parts and Functions of the Microscope

admin — Mon, 28 May 2007 06:23:47 +0000

A microscope, as we have before explained, may be either a single, or simple, or a compound instrument. The simple microscope may consist of one or of two or three lenses; but these latter are so arranged as to have the effect only of a single lens. In the compound microscope, not less than two lenses must be employed: one to form an inverted image of the object, which, being the nearest to the object is called the object-glass; and the other to magnify this image, and from being next the eye of the observer, called the eye-glass. Both these may be formed out of a combination of lenses, as will be hereafter seen. (more…)

Biology Lab Microscope - A Brief Overview of the Microscope

admin — Mon, 28 May 2007 06:21:55 +0000

THE instrument known as the Microscope derives its name from two Greek words, small, and to view; that is, to see or view such minute objects as without its aid would be invisible. The honors of the Italians and the Dutch; the name of the inventor, however is lost. Probably the discovery did not at first appear sufficiently important to engage the attention of those men who, by their reputation in science, were able to establish an opinion of its merit, and to hand down the name of its inventor to succeeding ages. (more…)