1894.] MICROSCOPICAL JOURNAL. 227 



moven^ents and may be raised or lowered, swung from 

 side to front of stand, brought near to or removed from 

 the mirror, inclined upon its axis, and rotated so that 

 either the side or the edge of the wick is in use. 



The outer box is eighteen and a half inches high in- 

 cluding its feet. It is finished at the top with a rim of 

 wood three-fourths of an inch wide and one inch deep, 

 set flush with the inside of the box and attached to its 

 edge by tongue and groove. There is a moulding around 

 the base of the box three inches wide and one inch thick, 

 to the projecting angles of which metal knobs are at- 

 tached, forming a tripod upon which the stand rests. A 

 large set-screw is fixed in the right hand panel of the 

 outer box, five inches from the top. The corresponding 

 side of the inner box is slotted, and the screw works 

 through the opening, passing into a nut imbedded in a 

 block which is tongued into the slot of the inner box. 

 (Fig. 4.) When the screw is released the inner box may 

 be raised or lowered : when it is tightened the sides of 

 the boxes are securely clamped together and fixed at 

 any elevation. The floor of the outer box is formed of a 

 block of heavy wood four inches thick, which adds to 

 the stability of the stand. 



The boxes are made with three-eight-inch oak boards, 

 thoroughly seasoned and arranged so as to counteract 

 any tendency to warp. The inside angles are strength- 

 ened by triangular strips glued in and braded, and the 

 layers of the top are secured in the same way. The out- 

 side surfaces of the boxes are polished and finished in 

 spirit varnish. 



The slot in the side of the inner box should extend 

 from the bottom to within three inches of the top and 

 be three-fourths of an inch wide. A frame of three- 

 eights stuff, one inch wide, is fitted into the opening at 

 the bottom of the box, bridging over the slot and stifl'en- 

 ing the box where most needed. A portion of the frame 



