UTILIZATION OF THE FISH WASTE OF THE PACIFIC OCEAN. 45 
per hour. Such a high capacity is suggested m order that it may 
be insured that the steam required for cooking can be supplied by 
the cannery boilers. It is believed that the requisite steam surely 
can be withdrawn from these for a period of G hours out of the 2-1. 
This appears especialh T probable in view of the fact that the cannery 
is shut down almost invariably during some period of the day, and 
that while still running a varying demand is made on the steam 
capacity of the boilers. As has been observed in a foregoing para- 
graph, the dressing force may be at work and the machinery which 
they tend may be in operation when the steam boxes and cooking 
retorts, requiring a large amount of steam, are idle. If it can be 
shown that sufficient steam is available to operate the cooker for a 
longer period than the 6 hours suggested, the capacity of the render- 
ing apparatus, and perhaps its cost, can be reduced proportionately. 
In addition to the three above-mentioned pieces of apparatus, 
there would be required convej^ors, a storage bin to receive the day's 
supply of raw materials, A~ats in which to recover the oils and stor- 
age capacity for the oils produced, and a house sufficiently large to 
inclose the apparatus and provide room for bagging and storing 
the output of dry scrap. 
Unless the conditions are such that the waste can be sluiced 
directly, by gravity, into the storage bin, a conveyor must be pro- 
vided to carry this from beneath the floor of the fish-cleaning house. 
The structure of this will depend on the angle at which it is required 
to work. Thus, if the conditions are such that a horizontal con- 
veyor can be operated, all that is needed is a water-tight trough 
through which pass blocks or boards of wood, suitably attached to 
and actuated by the movement of a chain belt, to direct the flow 
of the waste and the water in which it is immersed. The cuttings 
from the ''iron chink'' may be made to fall into a hopper placed 
beneath, which deposits the waste upon the conveyor; likewise that 
from the other cleaning operations may be directed, in any suitable 
manner, upon the conveyor. From the storage bin the material is 
to be lifted by elevator and fed into the retorts. Therefore the bin 
should be constructed with a sloping bottom so that the last of the 
material contained therein will feed automatically into the con- 
veyor. Strainers of woven wire should be inserted in the sides of 
the bin to permit the excess water to drain away. To accommodate 
the da3 7 's output in waste the bin must have a capacity of about 
20 tons. 
Two retorts of the upright, cylindrical form should be provided 
of about 5 tons capacity each, two offering the advantage over one 
of greater elasticity of operation. The daily output in waste of a 
one-line cannery, amounting to about 18 tons, could be rendered by 
the two retorts of the capacity suggested in two cookings each. 
