ZOOLOGY AND BOTANV, MICROSCOPY, ETC. 



771 



which serve to support the slides. On the inside of a are 80 fillets 

 1 • 8 cm. high, the space between adjacent pairs being about ■ 4 cm. 

 The inner hoop b has eight fillets, which are about 2 cm. apart. At the 

 intersection of the cross-pieces is inserted a T-shaped piece, which 

 serves, through the mediation of a hook, for removing the frame from 

 the solutions. The frame is made of cast iron, covered with white 

 enamel, and, when filled with slides, weighs about 400 grm. 



Fig. 182. 



Demonstrating the Neurofibrils in Ganglion Cells.* — A. Gemelli 

 places pieces 1 cm. square in a mixture of 3 p.c. bichromate of potash 

 and 1 p.c. osmic acid, in the proportion of 1:8; a few drops of sulpho- 

 cyanide of potash are added, and after an immersion of about half- 

 an-hour the pieces are transferred to the customary osmic-bichromate 

 solution. In from 48-72 hours the pieces are passed into the nitrate 

 of silver solution. Sections were made by the celloidin method. 



Apparatus for the Simultaneous Staining of Several Sections 

 fixed to Cover-slips or Slides.| — K. Melissinos has devised this 

 apparatus (fig. 188). It consists of a square box K, 80 mm. long, 

 45 mm. broad and high ; on the inner wall of one side is a plate A, 

 provided with grooves, which is held fast by a small knob hi. The 



+ Anat. Anzeig., xxvii. (1905) pp. 449-62 (6 figs.). 

 t Zeitschr. wiss. Mikrosk., xxii. (1905) p. 130. 



3 F 2 



