566 
DR. MARTIN BARRY’S RESEARCHES IN EMBRYOLOGY. 
428. Table, showing ( from ova of ten Rabbits ) that the diameter of the chorion is 
liable to much greater variation than that of the thick transparent membrane f. (par. 
365.) An asterisk if) denotes that the ovum was taken from the uterus, the other ova 
having been found in the Fallopian tube. The measurements are expressed in fractions 
of a Paris line. 
Diameter of 
Hours 
post 
coitum. 
Chorion. 
Clio. 
/. Thick 
transparent 
membrane. 
Hours. 
57 i 
1 
7 
1 
1 1 
I 
1 
7 
1 1 
1 
7 
1 
1 1 
+ 
i— 
1 
1 1 
1 
7 
1 
1 1 
36 
1 
8 
1 
1 2 
1 
1 
a 
12 
1 
1 
9 
12 
1 
1 
10 
1 2 
1 
1 
7 
1 1 
1 
1 
8 
1 2 
24 i 
1 
1 1 
T 2 + 
1 
1 
1 1 
1 1 
1 
1 
1 1 
1 1 
I 
1 
1 1 
1 1 
-1- + 
11 * 
1 
1 1 
1 
1 
1 1 
1 1 
1 
1 
1 1 
1 1 
post 
coitum. 
Diameter of 
Chorion. 
Clio. 
/. Thick 
transparent 
membrane. 
Hours. 
64i 
1 
9 
1 
12 
1 
8 
Ar + 
66 
1 
9 
1 
1 1 
\ + 
1 
1 1 
1 
6 
1 
1 1 
k + 
1 
1 1 
*i i 
6 ^ 
TT + 
*1 1 
6 ' 
1 
1 3 
72 
1 
6 
TT + 
1 + 
1 
1 1 
* i i 
i t 
1 
1 1 
* i i 
6 T 
1 
1 1 
*1 1 
7 ^ 
76i 
*1 
5 — 
TO + 
*1 _ 
5 
1 
10 | 
*1 
5 
i | 
10 
*1 
6 
TT + 
*f + 
To + 
*T + 
To + 
Diameter of 
Hours 
post 
/. Thick 
coitum. 
Cho. 
transparent 
membrane. 
Hours. 
57 i 
1 
8 
1 
1 1 
t^t + 
1 
1 1 
1 
1 
9 
1 1 
} + 
1 
1 1 
1 
1 
7 
1 1 
I 
1 
8 
10 
1 
1 
V 
1 1 
62 
1 
9 
1 
1 2 
1 
1 
8 
1 1 
1 
1 
8 
1 1 
1 
8 
1 
1 1 1 
1 
8 
* + 
1 
1 
8 
1 1 i 
1 
1 | 
8 
1 2 
JL 4. 
8 X 
1 
1 1 
62 
1 
7 
T2 + 
1 
1 
8 
1 2 
1 
1 
7 
1 2 
1 
1 ! 
8 
1 2 
1 
1 
8 
1 2 
1 
1 
7 
1 2 
429. Table of Measurements. 
The measurements are given in fractions of a Paris line the micrometer used, 
one of Frauenhofer’s, being divided according to French measure. The French inch 
(of twelve lines) is to the English inch, as ] '06575 is to T00000, or nearly one fifteenth 
more. Assuming it to be exactly one fifteenth more, the simplest mode of converting 
the fraction of a French line into the fraction of an English inch, will be to multiply 
the denominator of the former by the number 1 T25 (or 1 1^). Thus the actual length 
of the cell in Plate XXVII. fig. 225, which measured fo of a Paris line, is found to 
have been about of an English inch. (The nucleus of this cell is the ruditnental 
embryo.) 
When the object is not spherical, it is the long diameter, the measurement of which 
is given in the Table. 
The diameter of many objects contained within larger ones has been omitted, be- 
cause it may be inferred ; the scale being the same. 
