30 
Specimen 4. — 25 cc. gelatine + 25 cc. Bridgewater canal 
water + 5 mgms. sodium phosphate. 
After 2 days a number of spots appeared dispersed 
throughout the tube. 
After 3 days the tube contained one mass of small spheres 
and spots. 
After 4 days a number of discs of gas appeared, the sur- 
face layer was becoming liquid, 
Specimen 5. — 25 cc. gelatine + 25 cc. Birch pond water 
+ 5 mgms. sodium phosphate. 
After 1 day no alteration. 
After 2 days a few specks appeared dispersed throughout 
the jelly. 
After 3 days a number of spots appeared and discs of gas, 
surface layer of jelly becoming liquid. 
A disc of gas is formed when the gelatine remains firm 
and the gas struggles for freedom. 
Specimen 0. — 25 cc. gelatine + 25 cc. Carlile’s pond water, 
near Alexandra Park + 5 mgms. sodium phosphate. 
After 1 day specks appeared dispersed throughout the 
gelatine. 
After 2 days numberless very minute spheres appeared. 
After 4 days the spheres had increased in size. 
After 7 days a number of spheres of gas appeared. 
Specimen 7. — 25 cc. gelatine + 25 cc. ditch water, near 
Alexandra Park + 5 mgms. sodium phosphate. 
After 1 day a number of specks appeared throughout the 
jetty- 
After 2 days numberless spheres appeared. 
After 3 days the surface of the jelly had become liquid 
and turbid, the spheres were increasing in number. 
After 7 days a number of spheres of gas appeared and the 
whole mass was becoming liquid. 
Specimen 8. — 25 cc. gelatine + 25 cc. N. Berwick water 
supply + 5 mgms. sodium phosphate. 
