28o 



APPARATUS FOR SECTIONING 



\_CH. X 



Fig. 226. Circulation board, especially for Neclurus. This is prepared from 

 a board about S x 20 centimeters. Near one edge it has a hole for a perforated cork. 

 On the top of the cork is cemented a thick cover-glass with shellac or rubber cement. 

 The cork can be raised or lowered in the board. The gills of Necturus or the 

 web of a frog' s foot can be spread out on glass over the cork. (four. Appl Micr 

 1898, p. 131. 



Fig. 22; 

 embryologic material and small aquai 

 especially designed for collecting with a bicycle (four. 

 Appl. Micr., iSgS,p. /j/). 



227. Copper can with screw top for collecting J^ 

 ic material and small aquatic animals. It was <±ff 



Fig. 22S. Egg pipette. This is made by pulling a 

 short piece of soft rubber tubing over the cud of a i^/ass 

 pipette with rubber bulb. Willi this one can handle the 

 eggs both fresh and hardened without any degree of in- 

 jury, (four. Appl. Micr. /S9S, p. 129), 



Fig. 



I 



syia& 



Fig. 229 Hashing affa, a/us for tissues fixed in osmic and chromium mi v- 

 tures As shown in the figure the apparatus is connected with the -water fiifie by a 

 small side cock. It is composed of a double vessel, the inner one being made of per- 

 forated brass. There are .fecial perforated dishes to insert in the little compart- 

 ments. J his apparatus is convenient for washing cover-glasses, for the washing 

 out for iron hematoxylin, etc. The deeper box at the right answers for the stile 

 baskets or holders (Fig. /^g). 



