stands 
The general fonn of our stands, like most others of continental design, 
originated in the type first introduced by Oberhauser and developed by Hart- 
NACK. It is more or less universally admitted that the size and general arrange- 
ment of this kind of stand best corresponds to the requirements of scientific 
research. The extensive employment of the continental form even in English and 
American laboratories, as well as the testimony of numerous competent investi- 
gators, shows that, for scientific work at least, they are preferred even there to 
the more elaborate of the so-called English stands. 
Latterly we have endeavoured to perfect the mechanical details of the 
microscope, and have made several improvements in the three main directions, 
which constitute the essentiality of the stand, viz. the stage arrangements, 
the means for focussing and the illumination. 
A. The Stage. 
The dimensions of the stage in all our stands (except in the laboratory 
stands VI and VII) are sufficiently large to allow of any size slip or cultivation 
plate or dish being used. 
The stage is provided with an opening of 33 mm (I'Vig") in the case of 
stands I to V, in order that the large field possessed by the objectives of long 
focus (including the projection lens of 70 mm) may be fully utilized. It may, however. 
