THE STANDS OF MODERN OPTICIANS. 



m 



OPTICIANS. 



Hartnack & Prazmowski 



Nachet & Son (Paris) 



matter is dealt with somewhat incompletely, at least according to 

 English views. 1 



1 In addition to the description of the Oberhaeuser Stand which we have 

 preserved as being the type-model of the authors the following are described 

 and figured by them : 



STANDS. 



Medium horse-shoe. 



New small (Fig. 52). 



Students' (Fig. 53). 



Largest (Fig. 54). 



" Grand Modele " (Fig. 55). 



" Grand Modele, droit " (Figs. 56-7), 



" Moyen Modele, inclinant et droit " 

 (Figs. 58-9). 



"Nouveau Modele, inclinant " (Fig. 

 60). 



" Petit Modele, inclinant et droit" 

 (Fig. 61). 



Simple and compound combined (Fig. 

 62). 



Stereoscopic binocular (Fig. 63). 



Double and treble-bodied (Fig. 64). 



Binocular apparatus, two forms, 

 stereoscopic, and for two ob- 

 servers (Figs. 65-6). 



Inverted, two forms (Figs. 67-8.) 



Laboratory dissecting (Fig. 69). 



Pocket (Figs. 70-1). 



Horizontal (Fig. 72). 



Revolving nose-piece or objective- 

 carrier (Fig. 73). 



A general reference to eleven stands. 



Large and small Microscope, described 

 with a reference to a large and 

 small erecting dissecting Micro- 

 scope, and a travelling Microscope. 



A. Chevalier (Paris) 

 Ploessl & Co. (Vienna) 



F. W. Schieck (Berlin) . . 

 L. Bene-che (Berlin) . . 

 C. Zeiss (Jena) 

 E. Leitz (Wetzlar) 

 Seibert & Krafft (Wetzlar) 



G. & S. Merz (Munich) . . 

 Smith, Beck, & Beck (London) 



No detailed description. 



Describes in detail their special form 

 of fine adjustment without fric- 

 tion (Figs. 74-6). [See " Journ. 

 R. Micr. Soc." iii. (1880), pp. 

 883 and 1047.] 



No detailed description (Fig. 77 r 

 three forms). 



Brief description (Fig. 78). 



