This Microscope has just been brought out by Mr. Geo. Wale, whose reputation as a maker of flne stands is so well known. It embodies several new and important features, foremost amongt which is the method of hanging the body, so that it may be made to incline at any angle. The method now in general use for this purpose changes the position of the centre of gravity of the instrument, and renders the microscope more or less unsteady. The new method avoids this difficulty. The stage is of a new construction, very thin, so as to admit the greatest obliquity in the illumination of objects, and with clips which move round it, thus giving many of the advantages of a rotary stage. The clips may be easily and quickly removed, so as to leave a clear stage, and they may also be so applied as to Hold the slide against the under side of the stage, when very oblique light is required for resolving difficult test objects. The diaphragm is of the Iris pattern, a form wnich is generally acknowledged to be the best, but which has hitherto been very costly, those usually supplied being sold for $16. This Iris diaphragm is a new form, which, with several other features of this stand, has been patented by Mr. Wale. It may be easily and quickly applied or removed.
This Microscope is of substantial make, elegant design, and thoroughly good workmanship. It has the Society screw; draw tube with Society screw at lower end for receiving long focus objectives, analyzing prism, etc.; plane and concave mirrors^ the distance of which from the object may be varied; two Eye-pieces; 2-3 and 1-5 Objectives of Wale's Histological Series. It is very complete in all its appointments. Is capable of receiving and doing justice to any accessories, and is contained in a handsome black walnut box, with brass handle, lock and key. It is equal to all the ordinary requirements of any physician, student or naturalist. Sold only by the undersigned.