196 
BULLETIN OF THE BUREAU OP FISHEBIES 
Table 13. — Invertase 
[50 c. c. digests were used containing sucrose solution to 1 per cent and toluol to 5 per cent of total volume. Controls contain 
boiled extract] 
Description 
Caeca: Bluegill {^^Sentl 
Intestine: 
Bl-gill -{^^Sent: 
Carp (entire tract in 4 sections)— 
Section 1 control 
Section 1 .experiment-. 
Section 2... do... 
Section 3 do... 
Section 4 do... 
Carp (middle of intestine). 
/control 
"\experLment. 
fcontrol. 
Pickerel lexperiment. 
Icontrol. 
lexperiment- 
N-turus {^°Sent: 
{control 
coS!rT.'°*; 
experiment- 
Snapping turtle Oarge intestine) {extent: 
(control 
Bull snake ..•(experiment. 
I do... 
C.c. 
of ex- 
tract 
Milligrams glucose per c. c. di- 
gest 
1. 11 
1. 11 
1. 11 
1.11 
1.05 
1. 05 
1.05 
1.05 
1.05 
1.10 
1. 10 
1.08 
1. 08 
1. 15 
1. 15 
1.05 
1.05 
.95 
.95 
1. 11 
1. 11 
1.04 
1. 04 
1.00 
1.00 
1. 02 
Days 
1.05 
1.59 
1. 52 
1.41 
1. 17 
1.10 
1. 52 
1. 15 
1. 36 
.95 
1.06 
1. 11 
1. 85 
1.04 
1. 04 
1. 11 
1.96 
1. 11 
2.50 
1.05 
2. 96 
1.85 
1. 07 
1. 19 
1.10 
2.00 
1. 08 
1. 11 
1. 15 
1.47 
1.05 
1. 05 
.95 
1. 15 
1. 00 
1.00 
1.02 
1. 15 
2.00 
1.05 
1.05 
.95 
1. 49 
1. 11 
3.85 
1.04 
1.04 
1.00 
1.00 
1. 02 
Net gain 
Days 
1. u 
0.00 
2.63 
1.11 
3.85 
1. 05 
.00 
3. 33 
.54 
2.44 
.47 
2.22 
.36 
1. 19 
.12 
1. 10 
.00 
2.50 
.42 
0. 00 
.85 
.00 
1.39 
.00 
1. 51 
.80 
.62 
.14 
.00 
.90 
.00 
.03 
.00 
.32 
.00 
.00 
00 
.00 
11 
.20 
00 
74 
00 
00 
00 
.00 
00 
.00 
00 
.00 
0. 00 
1. 52 
.00 
2.74 
.00 
2.28 
1.39 
1. 17 
.14 
.00 
1.40 
.00 
.85 
.00 
.00 
.00 
.54 
.00 
2.74 
.00 
.00 
.00 
.00 
.00 
Table 14. — Invertase. Entire alimentary tract of pickerel 
(50 c. c. digests were used containing sucrose solution to 1 per cent and toluol to 5 per cent of total volume. Controls contain 
boiled extract] 
Description 
Esophagus. 
Stomach... 
Do. 
Intestine (small). 
Do. 
/control 
■\experiment- 
f control 
"\experiment- 
/control 
"\experiment- 
(control 
"lexperiment. 
/control 
- ^experiment- 
Bectum/'large intestine" {experiment! 
C. c. of 
extract 
Milligrams glucose per c. c. digest 
1.03 
1.03 
1. 15 
1. 15 
1.08 
1.08 
1. 15 
1.15 
1.08 
1.08 
1.09 
L09 
Days 
1.15 
1.16 
1.08 
1.08 
1. 15 
1.36 
1. 16 
1. 16 
1. 15 
2.00 
Net gain 
Days 
0.00 
.00 
.00 
.00 
.00 
.21 
0.00 
.00 
.00 
.01 
.00 
.00 
.00 
.32 
.00 
.03 
.00 
.00 
0. 01(?) 
• OK?) 
.00 
.85 
Table 14 shows the results of tests for invertase in extracts of mucosa through- 
out the digestive tract of the pickerel, showing the presence of invertase only in the 
intestine and here in very small amount. 
