338 Transitory Fissures of the Human Cerebrum 
TABLE OF EMBRYOS GIVING THE CONDITION OF THE BRAIN WHEN 
HARDENED IN ALCOHOL OR IN FORMALIN. 
0, indicates that the surface of the brain is smooth; 1, indicates that there are 
small folds present; 2, typical transitory fissures; 3, folds very marked with the 
beginning of maceration; 4, maceration complete and cerebral vesicles nearly solid 
5, entire central nervous system solid. 
EMBRYOS OF THE FIRST MONTH. 
VAVB ae 
Number length of Condition | Hardening 
f ; of th ; marks. 
aie omibryoun ey auids Poa 
12 2 0 _ Alcohol 60 & 
164 34 iL Formalin On ice 24 hrs., then in formalin. 
148 43, 0 | Alcohol 80 & 
76 4le 0 | Alcohol Whole ovum in absolute alcohol. 
iL 41g 5 | Go obote Salicylic acid. 
80 5 0 | Alcohol 
1G | 5 2 Alcohol 
19 5 5 | Alcohol 
2 7 0 | Alcohol Ovum in strong alcohol. 
4 7 1 | Alcohol 
18 7 2 _ Alcohol 
113 8 4 | Alcohol 
EMBRYOS OF THE SECOND MONTH. 
163 9 0 Formalin 
88 10 0 Alcohol 
114 10 3 Alcohol 
109 all 2 Alcohol 
175 13 3 Alcohol 
144 14 0 Formalin | 
43 16 0 Alcohol _ Embryo within amnion in strong alco- 
hol 
106 17 5 Formalin | In water 24 hrs., then in formalin. 
9 174% 0 Alcohol 
5 181g 4 Alcohol | 
74 19 3 Alcohol | 
22 20 2 Aleohol | Whole ovum placed in alcohol. 
108 22 4 Alcohol 
57 23 5 Alcohol 
100 27 5 Alcohol Weak alcohol. 
45 28 2 Alcohol | 
86 50 i Formalin Embryo within amnion in formalin, 
two fissures. 
75 30 5 Alcohol 
ei ts ea 
