ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 



675 



axis was wholly neglected in the design ; and indeed the slender 

 attachments of the body-tube with its focusing adjustment, the 

 ponderous mechanical and micrometer stages, and the adjustable 

 diaphragm on the long square bar indicate on the part of the maker 

 a very imperfect estimate of the necessity of stability for the purpose 

 he had in view. 



Giacomini's Microscope with large Stage. — Signor F. Koristka, 

 of Milan, sends us fig. 117 as showing the modifications which he 

 has introduced into this instrument since its original design.* 



The lateral " wings " by which the width of the stage is increased 



Fir,. 117. 



to 40 cm. (wide enough to take sections of the entire human brain) are 

 in the form of hollow trays, while the fine adjustment is now effected 

 by an arrangement at the nose-piece acting similarly to the old form 



* See this Journal, v. (1885) p. 516. 



2 y 2 



