MICROSCOPY. 



501 



scope, the Continental type seems to be the 

 heavy compact stand, with small square stage 



FIG. 4. COMPACT DISSECTING MICROSCOPE, WITH HAND- 

 RESTS AND ERECTING COMPOUND BODY. 



supplied with side- wings as hand-rests; and 

 with a reaction, lately, to the opposite extreme 

 of large wooden stands, of which the supports 

 for the hands constitute the 

 largest part, as in the instru- 

 ment of Waechter (" J. R. M. 

 S.," 1882, p. 677), Verick (" J. 

 R. M. S.," 1881, p. 659), and 

 Seibert & Krafft (Carpenter, 

 p. 54). Wooden models have 

 been likewise introduced into 

 England by Mr. W. Teasdale 

 ("J. R. M. S.," 1882, p. 549), 

 Prof. Huxley (Carpenter, p. 

 56), and others. They have 

 not as yet become American- 

 ized, though possessing mani- 

 fest advantages that render 

 them certain to be used when 

 better known.* In America a 

 square base and stage with side- 

 wings is adopted by one large 

 maker, in the "compact" dis- 

 secting microscope (see Fig. 

 4) ; but the prevailing type of 

 the best stands seems to be 

 rather larger, with round base 

 and heavy pillar, like thosa 

 of Mr. Joseph Zentmayer, of 

 Philadelphia (Fig. 5), and of 

 Messrs. R. and J. Beck, of Lon- 

 don and Philadelphia. 



* The credit for originating this style 

 of stand seems to belong to Mr. H. J. 

 Slack (Quekett, "The Microscope" 1855, 

 p. 62). 



For such stands, however large, hand-rests 

 add greatly to the steadiness as well as the 

 comfort of the hands, and they are far more 

 satisfactory when large, and supported inde- 

 pendently, than when attached to the stage. 

 The form described by the writer (Behrens, 

 Am. ed., p. 109) is shown at one fourth natural 

 size, open for use, in Fig. 6, and closed for port- 

 ability in Fig. 7. It can be easily made for his 

 own use, from mahogany or other hard wood, 

 by any amateur having mechanical skill. The 

 microscope (like Fig. 4 or Fig. 5, for instance) 

 stands in the center, held in place by two wood- 

 en buttons, while its stage is somewhat above 

 and not far from the upper ends of the inclined 

 rests. When portability is not required, the 

 rest is arranged permanently as in Fig. 7, be- 

 ing fastened together with glue and brads, in- 

 stead of hinges and hooks. 



The Stand. Only lately has there been an 

 American model of stand. Formerly it was 

 sufficient to recognize the Continental model, 

 small, compact, and portable, but of very lim- 

 ited capabilities for the reception of accesso- 

 ries most of which accessories, by-the-way, 

 the Continental microscopists wholly abjured ; 

 and the English model, large, elaborate, and 

 cumbersome, with a sumptuous outfit of in- 

 genious accessories. The English model was 

 chiefly in favor in America, Whether imported 

 from abroad or imitated by our own manufact- 

 urers. Within a few years past, however, a 

 really new model has been developed, chiefly 

 through the influence of American innovations. 



FIG. 5. DISSECTING MICROSCOPE. 



