The Boston medical and surgical journal . to receive a flat-ironor other weight, if requir-ed, and to admit the otherparts when the instrumentis packed. Between the uprights isreceived the bearing semicircle, made of three pieces of black wal-nut glued together, the inner one having the grain directed length-wise, the two outer ones vertically. This is provided with au slot partly vertical, partly horizontal, and several notches. Abinding screw holds it at any angle and at various heights betweenthe uprights. The microscope-tube, made heavy by a leaden tube inside, islaid upon two V-shaped sup
The Boston medical and surgical journal . to receive a flat-ironor other weight, if requir-ed, and to admit the otherparts when the instrumentis packed. Between the uprights isreceived the bearing semicircle, made of three pieces of black wal-nut glued together, the inner one having the grain directed length-wise, the two outer ones vertically. This is provided with au slot partly vertical, partly horizontal, and several notches. Abinding screw holds it at any angle and at various heights betweenthe uprights. The microscope-tube, made heavy by a leaden tube inside, islaid upon two V-shaped supports cut out of the wood, being heldsolely by its weight when used in the horizontal or inclined po-sition. The microscope-tube has a ring an inch wide, fitting tight, butbeco ling loose on pressing its handles, aud having a little projec-tion >r spur on the side opposite its handles, as shown in figure 2. T, anterior V-shaped s ipport is also shown in this figure. Ithas 8 »ijje of brass let into the wood for the spur on the ring to. 378 New Stand for the Compound Microscope. play against. As the posterior surface of this support is slantedabout one sixteenth of an inch, it is evident that in turning thetube through a semicircle it will advance or recede that turning of the tube is performed by means of the black paste-board disk clasped to the tube near the eve-piece, which makes asufficiently delicate fine adjustment. The horseshoe staic consists of two pieces of brass, cast andplaned. 4 inches across at the widest part, and 3 inches in first, nearest the observer, turns on a screw at the centre ofits semi-circumference against a brass plate screwed to the bear-ing semicircle. The second turns on a screw which nnites one ofits arms—the right—to the corresponding arm of the first horse-shoe. The first horseshoe therefore carries the other with it: thesecond turning very easily, is moved independently of the handles are fiat, the one
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Keywords: ., bookcentury1800, bookdec, booksubjectmedicine, booksubjectsurgery
