Mr. Bakers represents smaller Compound Microscope, differing in some respects from that just described. It is not fitted with sub-stage, but such an appliance may be readily attached, dovetailed grooves being left for the purpose. The motions to stage and body, and general finish, are similar to those of the best instruments, and it is altogether such a microscope as can be well recommended for medical or other purposes where a good stand is required, and to which it is intended that further additions shall be hereafter made.

A smaller compound achromatic microscope, called the Educational Microscope. This is peculiarly adapted for students, and is supplied in a neat mahogany case, with the necessary apparatus and excellent object-glasses, for the small price.

Mr. Baker, in his binocular instrument, has succeeded in reducing some of the difficulties to a minimum. The setting of the prism, with its necessary stops, is so contrived that it is contained in one piece or fitting, so that when the monocular body is required to be used, this piece can be removed, and an uninterrupted field obtained, the light entering the tube at the utmost obliquity for high powers. The body and nose-piece is seen detached. It has this advantage, that the prism remains in permanent adjustment when the brass nose-piece B is screwed home.

Another feature in connection with the use of the binocular, and not the least important, is that of illumination; we have been much pleased with the simple arrangement of a cheap condenser by the same optician. It consists of two plano-convex lenses, the lower one being hemispherical; the upper lens is placed just within its focus; the two are fitted into a sliding-tube which admits of easy adjustment.

Another feature in connection with the use of the binocular, and not the least important, is that of illumination; we have been much pleased with the simple arrangement of a cheap condenser by the same optician. It consists of two plano-convex lenses, the lower one being hemispherical; the upper lens is placed just within its focus; the two are fitted into a sliding-tube which admits of easy adjustment.

We cannot also prefer with some confidence to the Students Binocular Microscope produced by Mr. Baker; it possesses remarkable excellence for the small sum charged for it. This instrument is rather larger than the Educational by the same maker, and is fitted with sliding-stage.

It has the usual coarse and fine movements, and is supplied with a double mirror and one pair of eye-piece, the latter having rack and pinion adjustment. It is seem, and sold as there represented - a less sum than is charged for altering the larger microscopes.