BRIEFER ARTICLES 
IMBEDDING AND WARMING STAND 
(WITH TWO FIGURES) 
The warming and imbedding stands for paraffin work used in labora- 
tories are unsatisfactory. Commonly a plate of copper or other metal 
supported on legs is employed, and by some the apparatus devised by 
Dr. FERGUSON is used. The apparatus here described was devised 
five years ago, and it is at the suggestion of various botanists that this 
description is published. The apparatus is a modification of a familiar 
temperature stage for microscopes. 
ey 
Lag | pt 




Fic. 1,—Side view of apparatus: A, water intake; B, water outlet; C, opening 
for thermometer. 
The imbedding or warming stages commonly employed are unsatis- 
factory for the following reasons: (1) temperature cannot be controlled; 
(2) the imbedding trays cannot be removed quickly for cooling for fear 
of disturbing the orientation of the imbedded materials (and rapid 
cooling is essential for best results). The apparatus here described 
does not possess these objectionable features and permits of rapid work. 
The apparatus consists of a copper box constructed on the principle 
of a water jacket of a condenser. The dimensions of the one employed 
here are length 20 cm., width 14 cm., and depth 2.8 cm. The box is 
provided with an inlet for water on the bottom (figs. 1 and 2, A), and an 
outlet for water on the upper side (figs. 1 and 2, B). There is also pro- 
vided on the upper side an opening into which is fitted a stopper with a 
339] [Botanical Gazette, vol. 56 
