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Note on Lietz New Microscope Stand. 

 Bt Edward M. Nelson, F.R.M.S. 



It is with surprise as well as pleasure that, owing to the 

 energy of one of the foremost continental microscope makers, 

 I am able to place before you a new stand, which is a further 

 departure from the " Oberhauser," and a nearer approach to the 

 "English" model than any continental instrument hitherto 

 constructed. 



The first striking feature is the absence of the heavy horse- 

 shoe foot, its place being occupied with the bent claw, its spread 

 being Sin. by Gin. 



The lightness and stability of the stand are at once apparent; 

 when the instrument is placed in a horizontal position, and the 

 tubes are fully extended, its centre of gravity is well within its 

 base ; this microscope, therefore, has no need of a second and 

 more extended foot similar to those supplied to Zeiss micro- 

 scopes. 



The next feature is the adaptation of my horseshoe stage in 

 place of the narrow stage with the small hole in it. The use- 

 fulness of this stage is unfortunately largely curtailed by having 

 the grooves for the sliding bar ploughed on its face. The 

 sliding bar is moreover provided with spring clips, which ought 

 to be removed. These, of course, completely render nugatory 

 the advantage of the horseshoe stage, because the working 

 distance cannot be felt. Spring clips on the stage have been 

 the means of breaking more fronts of object glasses than all 

 other pieces of apparatus put together. 



The lugs of the sliding bar project above the level of the stage ; 

 this interferes with the free movement of the slip. 



The body is the same as in all continental microscopes, the 

 coarse adjustment has oblique rack work, and the fine adjust- 

 ment is of the plain direct type, one revolution of the head causing 

 a movement of one-fiftieth of an inch, a motion three or four 

 times more rapid than in the best instruments in this country. 



