ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 



797 



Griffith's Club Microscope. — Mr. E. H. Griffith writes us that 

 he has further improved the ' Griffith Club Microscope ' * as follows : 

 " The bar that holds the clips has a stiflf spring over it. The front 

 of the bar is flattened. The clips may be turned back out of the way, 

 and when needed again the spring holds the clips down (or the bar 

 in position). Some have been made with an arrangement to j^ush the 

 bar either way, letting the bar pass through the stage-holder but 

 above it a nut gives the double clips a lateral motion and the spiral 

 spring keeps the bar steady. The double clips clasp the slide and 

 carry it with them. The lamp attachment has been improved 

 also." 



Nachet's Class Microscope. — This (fig. 127) was intended by M. 

 A. Nachet to be passed round amongst the students in a class, being 

 at the same time very steady on the table. It can only be used in a 



Fig. 127. 



horizontal position. The body-tube is focused by the rack and milled 

 heads at the top, while the stage and mirror, which slide on the 

 horizontal bar, arc raised or lowered by the milled heads at the side of 

 the standard. The shifting of the object from right to left is effected 

 by the hands. 



Nachet's Microscope with Large Field.f — A. Gravis describes a 

 new Microscope by M. A. Nachet, of which the speciality appears to 

 be that it affords a larger field of view than usual in Continental 



♦ See thig Journal, iii. (188P.) p. 11.3. 



t Btill. Soc. Bclg. Mif-r., x. (I8H4) pp. 194-7. 



