130 | THE MICROSCOPE. Sept 
condition of affairs is attributed to the rigid enforcement 
of the laws of health prescribed by the Hebraic law, and 
also to the racial sobriety producing a sturdy constitution, 
capable of resisting disease to a considerable degree. 
Seeds as Objects,— Science-Gossip suggests making 
slides of the common garden seeds and says that foxglove, 
mignonette, petunia, larkspur and bartonia are especially 
interesting and beautiful. To kill the attached fungi or 
insect ova, subject the seeds to 200 F. of heat. Mount as 
usual. 
PRACTICAL: SUGGES Titi 
By L. A. WILLSON, 
Preparation of Marine Animals.—These forms should 
be freed from sea water before treating them with either 
alcohol or any fixing reagent that precipitates the salts of 
sea water. Fixing solutions for these animals should never 
be made with sea water as a menstrum. If alcohol be 
employed it should be acidified. 
Penicillium Cupricum.—Mr. J. de Seynes states that 
the fungus called by this name is but aform of P. glaucum 
the ordinary appearance of which it assumes when trans- 
ferred toa different medium. 
Cyclops Quadricornis.—This little animal is found in 
lakes, ponds and streams. When gathered ina transpar- 
ent vessel it may easily be detected as little white specks ~ 
darting from side to side with a peculiar jerking motion. 
To examine it alive, dip out a specimen witha table-spoon. 
If possible obtain a female with her extended egg-bags. 
Such a female may be known by the egg-bagss on each side 
of her body. Rémove most of the water from the spoon 
with a medicine dropper; then transfer the cyclops with 
a drop of water to a slide witha cell. Fill the cell full of 
water, cover and examine with a one inch or three-quarter 
inch objective. The specimen will be worth the trouble 
