Botany and Zoology. 269 
Biycerine, chlorid of calcium, acetate of alumina, arsenious acid, Goad- 
y's solutions, and various combinations of these and other preparations 
5 s t 
highly satisfactory in all respects when properly used. By their use the 
larvae and recent pups of the tomato-worm were preserved and still re- 
id 
vantage is the extreme simplicity and cheapness of the solution, 
To use this fluid I prepare first the following stock solution, which 
may be kept in wooden barrels, or casks, and labeled: 
Soxvrron A. I. 
BOCK AMG 5 ge 40 oz. 
Nitre (nitrate of potassa), . = « . +.» 40% 
Soft water, . ‘ 7 ‘ 1 gal. 
This is the final solution in which all invertebrate animals must be 
Preserved. A solution with double the amount of water may be kept if 
ales and called A. IJ. Another with three gallons of water will be 
arily employed, and is designed to preserve the object while ; 
Soft water, . : 
Oita BAe ee lq 
Arseniate of potassa, - ‘ ‘ . pA OMK err #f 
_ Another solution with double the amount of water may be made if de- 
Sired, and called solution B. IT. apis 3 . 
-_ To preserve animals with these solutions they are, if insects or marine 
invertebrates, ordinarily placed first in solution B.I, but if the weather 
