476 



SUMMARY OF CURRENT RESEARCHES RELATING: TO 



Duthiers to meet tho case of microscopic examination being required of 

 the surfaces of large objects of various kinds, especially animals. 



On a tripod with broadly spreading feet is fixed, so as to rotate on 

 the centre of the tripod, a curved standard 20 inches long, pierced in 

 five places to reduce the weight. At the top of the standard is the slido 

 support for tho body-tube, which is raised and lowered by rack and 

 pinion. The slide itself also rotates laterally on the end of the standard 

 so that the body-tube can be set at an angle. 



Dumaige's Travelling Microscope.* — This Microscope of M. 



Dumaige (fig. 63) anticipates one of the features of Mr. Giles's " Army 



Medical Microscope," in that the stage and foot are in one piece. 



The following is a translation of the description : — 



" The instruments which the makers offer for sale under tho name of 



travelling Microscopes, if they have tho advantage of being small in size, 



Fig. 63. 



have on the other hand, in most cases at least, the grave inconvenience 

 of being deficient in the stability necessary for delicate observations. 



* Comptes Rendus Soc. de Biol. (Paris), 1887, p. 103. (Seance of 19th Feb.) 



