1909] MICROSCOPICAL JOURNAL. 3i 
served specimens taken from hundreds of species of ani- 
mals, both normaland abnormal. The eye can thus have 
a natural setting which removes the ghastliness of alco- 
hol specimens. Greeff gives illustrations of how this is 
done. 
In a very lengthy appendix he describes: (1) the cornea 
and its layers, (2) the iris and chorioid, (3) the lenses, (4) 
the zonula ciliaris, (5) the retina, and (6) the optic nerve. 
This, of course, includes the method of demonstrating all 
the parts and notes on the comparative anatomy of the 
eye in animals. | 
This would make an excellent laboratory course, for 
Greeff has explained a hundred or more different methods 
of treating tissues in order to bring out the esthetic and 
pathological results. When a student has thoroughly 
practiced all herein indicated he will have a wonderful 
collection of slides, facility for making preparations, and 
ability to work on any other kind of tissues. His in- 
stincts will, by that time, guide him safely into unex- 
plored fields. Especially would this be true in places 
where one has access to abatoirs and the dissecting rooms 
of medical colleges, but of course the eyes of the lower 
animals are constantly obtainable. LHvery large city has 
a pound where cats and dogs are killed by the score every 
week. A Washington poundmaster boasts of having 
slaughtered 20,000 dogs since he entered the business 
many years ago. No house-wife is properly qualified 
until she had drowned some score of kittens while every 
cat will secure for you the eyes of birds, mice, chickens, 
and rats. The insects will come to you of their own ac- 
cord and peddlers will bring the eyes of fishes. Once 
you have entered upon collecting, all nature seems to set 
to work to throw its bounties into your lap. Objects come 
unsolicited and so unobtrusively that we forget the fact 
that in a single month more material comes than we had 
seen before in a lifetime and more than we can possibly 
