4 
IMPERIAL COLLEGE OF 
being weighed out in the morning and uniformly dis¬ 
tributed over the three meals. Drinking water was given 
ad libitum, a sufficient quantity was likewise weighed in the 
morning and what was left was determined after 24 hours. 
Common salt was regularly given every meal, G —10 Grms. 
per day, according to the general appetite of the animals for 
the food under experiment. During the trial each animal 
was kept in a separate box without litter, on a cemented 
floor which was cleaned several times per day from urine, 
in order to prevent the small particles of food scattered by 
the sheep from being polluted. The small amount of 
scattered food was always carefully collected and put back 
into the mangers, which had been so constructed as to 
hinder the animal from freely moving the head while eating, 
in order to prevent their scattering of the food as much as 
possible. In the winter of 1884/85 so called “feeding 
boxes,” constructed by Henneberg for such experiments 
(see the illustration on the next page) were procured and 
thenceforward exclusively used. These consist of a two- 
storied case, the upper part of which is just spacious enough 
to allow a sheep to lie down or stand up freely without 
allowing it to turn or to draw the head easily out from the 
manger. The latter contains a shallow dish of tinned sheet 
iron, closely fitted into and filling out the whole manger, 
which is also furnished with a rack. The side of the box 
behind the sheep admits of being let down so as to form a sort 
of ladder, on which the animals can be easily guided into or 
out from the box. The lower story was just so high as to 
admit of placing a bottle there for the reception of the urine 
guided into that vessel through a rubber pipe, which formed 
the tail of a large rubber funnel buckled on the sheep in 
proper position. The fteces of the animals were collected 
in a bag of rubber cloth, fastened to the sheep by means of 
several girdles, which arrangement had likewise been used 
during the earlier trials since 1882. The contents of this 
o 
