8 
Where one-storey buildings are installed with artificial heating 
apparatus, -a timbered floor is often necessary. This may be provided 
with spaces for the passage of air, and be raised above the level of 
the ground to enable steam or hot-air pipes to be laid and to create a 
hot-air chamber in this region. 
Light and Windows in Factories. 
The bad effect of light on rubber, and the necessity of having 
abundance of light in the machinery sections, necessitate the adoption 
of a different arrangement in various parts of the factory. There can 
hardly be too many windows near the engines and washing mills. 
These should therefore be provided and constructed so as to open 
inwards for draught purposes. 
In the curing room, however, windows must either be supplied 
with red glass, or curtains, to stop the chemical rays from reaching 
the rubber, or with wooden or corrugated iron doors — which can be 
opened from the inside to allow light to enter during inspection of the 
rubber. It is necessary that the rubber in the curing room be fre- 
quently inspected in order that the development of moulds and 
tackiness may be arrested in the initial stages; hence the desirability 
of having even the curing room well supplied with light under control. 
Doors and windows should, whenever possible, be made to close 
on the inside in order that draughts of fresh air can enter the building 
without check . — (India Rubber Journal.) 
POTATOES AND JERUSALEM ARTICHOKES 
FOR PIGS. 
“ In his valuable work on “Pigs and their Management,” Mr. H.W. 
Potts, Principal of the Hawkesbury College and Experiment Farm, 
Richmond, New South Wales, gives a chapter on “ Crops for Pigs.” 
Amongst the roots and tubers he considers Jerusalem artichokes as 
a most valuable food. Why this crop has been so much neglected 
by Queensland pigbreeders is hard to understand, seeing that its 
cultivation is simple and the yield of tubers considerable. 
Concerning roots and tubers generally as pig-food, Mr. Potts 
says that : — “All these, when fed continuously and exclusively to 
pigs, have a lowering tendency on the digestive functions, but that this 
is a matter which, in intelligent hands, can be controlled. The value 
and importance, he says, of root crops for pigs, particularly in our 
warm climate, are now widely recognised, in so far as they are used 
only as a succulent and relishable adjunct to other classes of food, 
richer in protein, and containing less moisture. A normal 
nutritive ratio must be maintained, and the success of feeding 
largely depends on the right interpretation of the balanced ration. 
We find that many root crops form excellent aids to the standard 
feeds. 
