ding solution poured in. The object is taken froi 



needles may be passed through the box t support 



In hardening, the method L r iven bv Yiallan. > o 



roform is preferable, since the operations may be < 



greater rapidity. An air-tight chamber should b 



oiighlv hard, ned, which requires ai>out twenty-foui 

 the paper cut from the sides and transferred to 7(1 



clamp of the microtome. Solution No..') i< pou 

 into this the celloidin block is pressed, after dippii 

 in solution No. 1. Place in chloroform until hare 

 Reconstruction points are often very desirable 

 the ordinary metallic imbedding box (fig. 1) ma< 

 pieces, a and a, heid in place by the overlapping s 

 ends and 



E 



I — (-.1 I J | holes should be so drilled that 



After being drawn tightly tin v 

 FlG - L are cemented to the sides .if 



the box by a drop of celloidin. Five or six cm. of the thread ahould 

 be left hanging. The bottom of the box is made by fitting in a piece 

 of heavy blotting paper. The object is placed upon the thread* in the 

 desired position, and the imbedding mass poured in. As soon a.- hard- 

 ened the celloidin holding the threads is dissolved by a drop of ether. 

 The loose ends are soaked in solution No. 2, which has been thickened 

 by the addition of lampblack. The threads are then drawn through, 

 leaving the lampblack adhering to the celloidin, thereby forming 

 excellent reconstruction points. 



For small objects where reconstruction points are not needed the fol- 

 lowing method may be advantageously employed. The heads are 

 clipped from fine insect pins, which are then placed in handles in such 

 a way that they may be easily removed. On these pins the objects are 

 oriented in the desired position ; the pins are then removed from the 

 handles and fixed in a cork (fig. II, a) previously perforated by a 



