T A B L E
I *
Somite development on various media
M e d i u m
N o .
embryos
Average no. pairs
somites ± standard
error
M e d i u m
N o .
embryos
Average no. pairs
somites ± standard
error
Saline-agar
20
0
Saline-soluble fraction
21
1-8 ± 0-5
W
Albumen
32
5-6 ± 0-3
Free amino acids
20
1-9 ± 0-5
Albumen dialysate
34
4-7 ± 0-5
Glucose + glutamic acid
15
0
><
Dialysed albumen
30
0
Glucose + glutamine
15
0
o
Q
Ovalbumin
18
0
Glucose + alanine
23
2-0 ± 0-3
W
Glucose
109
0
Glucose + alanine - f H
2 S
20
3-4 ± 0-6
W
c/ a
Glucose - f dialysed albumen
20
0
Glucose + H
2 S
36
1-7 ± 0-2
H H
C/ 3
Boiled dialysate
16
2-3 ± 0-5
Pepsin hydrolysate
18
0
3 '
Condensed dialysate
22
2-4 ± 0-4
Glucose + pepsin hydrolysate
17
1-8 ± 0-5
Boiled and condensed dialysate
17
2-0 ± 0-3
Acetone precipitate o f dialysate
19
0
^
Base-insoluble fraction
21
0
Glucose - f acetone precipitate
22
0
Base-soluble fraction
16
1-9 ± 0-3
Supernate o f acetone precipitation
17
2-1 ± 0-6
Ether-soluble fraction
14
0
•(Following Fraser, 1957.)
569