268 Chittenden and Hutchinson—Influence of 
Uranyl sulphate. 
3 Relative 
U0.S0,+3H,0. Undigested residue. Fibrin digested. proteolytic action. 
0 0-1832 gram. 81°68 per cent. 100-0 
0025 per cent. 0)°2545 74°55 91:3 
0-050 0°2673 73°27 89°7 
0-100 0°3155 68°45 83°8 
0-500 06084 39°16 479 
1-000 0°8225 17°75 21°7 
Ammonio uranous sulphate. 
USO, +(Nitt,)2S04 Relative 
+H,0. Undigested residue. Fibrin digested. proteolytic action. 
0 0°1833 gram. 81°67 per cent. 100-0 
0-025 per cent. 02859 71°41 874 
0-050 0°3143 68°57 83°9 
0-100 0°3742 6°258 766 
0-500 0-9113 8:87 10°8 , 
1-000 1:0070 0 0 
A comparison of the action of the two last salts, shows plainly 
that the ammonio uranous compound has a far greater inhibitory 
action than the simple uranyl] sulphate. 
Ammonio uranic citrate. 
(UWO2)s(C5H507)2 ; Relative 
+(NH,);C5H;0;. Undigested residue. Fibrin digested. proteolytic action. 
0 0-1747 gram. 82°53 per cent. 100°0 
0-025 per cent. 0°1795 82°05 99-4 
0-050 0°2102 78°98 95°7 
0-100 0-2180 18°20 « 94°7 
0500 0°9055 9°45 11-4 - 
1-000 0 0 0 
Sodio uranic sulphate. 
UO.S0, + Na.SO4 Relative 
+2H.0. Undigested residue. Fibrin digested. proteolytic action. 
0 0°2624 gram. 73°76 per cent. 100°0 
0:025 per cent. 02666 73°34 99°4 
0050 03688 63°12 85°5 
0-100 04488 55°62 756 
0500 08131 19-69 26°7 
1-000 0-9891 1-09 age 
In the two last series, the ammonio uranic citrate is noticeable for 
not causing a gradual diminution in the proteolytic action of the 
ferment; but on the contrary, it gives rise to a sudden and rapid fall- 
ing off in proteolytic action, when a certain percentage of the salt is 
added. The same thing is to be noticed in the case of the uranyl 
