34 
Maries 
Stand I*. Stage with rotating vulcanite disk of 
abt. 43/4" dia. (120 mm), which is removable and can at any time 
be replaced by the mechanical stage (Price M. 100. — ) 
described below. The rotating disk may be accurately 
centered by means of two milled-head screws. This adjust- 
ment also serves to give slight motion to the object in the 
absence of the mechanical stage. 
In all other respects exactly as stand I (Fig. 5). 
Without mechanical stage 
With mechanical stage capable of a movement of IS mm 
in either direction and rotating vulcanite disk . . . 
For our mechanical stages we claim the following advantages 
not possessed by those made hy others in former years: 
1. They permit of the use of slips of any size. Cultivation 
plates or dishes may be placed upon the stage by removing the 
clips and milled heads, which is very easily done. 
2. They are provided with two vernier scales, admitting of the 
position of a point being read within a ^/jj, mm. When using this 
arrangement the slip should always be pushed against the projection 
at the left hand of the object holder, so that it always occupies 
the same position in relation to the movable slide of the stage. The 
divisions can be used for measurements, if the accuracy required 
does not exceed 0.10 mm. 
3. The stage is available with any method of illumination. 
Attachment of the mechanical stage is effected in the simplest 
manner by loosening the centering screws, compressing the counter- 
spring, removing the rotating disc and substituting the former by 
the reversed manipulation. 
The prices of stands do not include any optical or mechanical parts beyond 
those enumerated in the above specification. Suitable combinations are com- 
piled at the end of the catalogue. 
