W. Nicoll 
181 
It is evident that in the control sample the eggs were unduly long 
in hatching. 
VII. In this series the faecal material was moderately moist and 
contained numerous hook-worm eggs together with a few larvae. The 
material had been deposited for some time. Most of the eggs were in 
an advanced state of development. 
This experiment was almost similar to No. 1. The details are as 
follows: 
Weight of 
faeces 
1. 
2-29 
Control 
2. 
1-7 
With 25 c.c. rain water 
3. 
2-7 
With 13-5 c.c. rain water 
4. 
2-2 
With 11 c.c. 10 % salt solution 
5. 
2-1 
With 10 c.c. 5 % salt solution 
6. 
1-4 
With 7 c.c. 2'6 % salt solution 
In No. 2 the faeces were covered to a depth of nearly half an inch 
by the rain water. In No. 3 they were nearly covered, while in 4, 5 
and 6 they were a little more than half covered. 
The results of these experiments are shown in the subjoined table. 
Oct. 31 
Nov. 1 
2 
3 
4 
5 
6 
7 
8 
9 
10 
11 
12 
13 
14 
1. 
+ 
+ 
+ 
+ 
-1- 
+ 
- 
+ 
+ 
- 
+ 
- 
- 
-t- 
2. 
-i- 
+ 
-1- 
+ 
+ 
+ 
+ 
- 
+ 
- 
+ 
-t- 
- 
-1- 
3. 
+ 
+ 
+ 
+ 
+ 
+ 
-H 
-1- 
+ 
+ 
+ 
+ 
+ 
+ 
4. 
+ 
+ 
+ 
5. 
+ 
-h 
+ 
+ 
+ 
+ 
-1- 
- 
- 
-1- 
- 
- 
- 
6. 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
- 
-1- 
The following notes w'ere made on this experiment: 
Nov. 1st. Faeces in No. 2 floated bodily to the surface of the water. 
Larvae in cultures from Nos. 3 and 4 very scanty. 
Nov. 3rd. No. 2 very turbid but larvae cultured on Nov. 1st fairly 
numerous. On Nos. 3 and 6 a thick grey scum has grown on the surface. 
On No. 5 a slight broken scum has grown. 
Nov. 4th. Nos. 2, 5 and 6 covered with scum. No. 3 overgrown 
with a thick mould. Of the larvae from the previous day’s cultures, 
they were strong and vigorous in No. 1. few' and feebly developed in 
Nos. 2, 3, 5 and 6 and a few dead in No. 4. 
The faecal material and the cultures obtained therefrom were 
continuously observed throughout. It was thought at first that the 
overgrow'th of mould and scum w'ould spoil the experiment but this 
did not prove to be the case. 
