In Table 3 are given the results of the examination of 21 typical
samples of trimming stock pulp prepared at different plants and in
different localities. This table is of especial interest in showing
that the relations between the results of the various analytical
determinations differ from those of whole tomato pulps as given in
Table 5. For instance, in No. 1470 the immersion refractometer reading
is 45.90, and the per cent of solids is 9.54, whereas, according to
Table 5, the per cent of solids in the pulp corresponding to an index
of refraction of 45.90 should be 8.57. The specific gravity of the
pulp is 1.0373, which, according to Table 5, should correspond to 8.98
instead of 9.54. Of course it cannot be said definitely that a pulp
which on examination is found to conform to all the relations shown
in Table 5 is necessarily whole tomato pulp. It is entirely possible
for an occasional sample of trimming stock pulp to conform to all the
relations shown in that table; moreover, the extent to which different
samples of trimming stock pulp will vary from the relations shown in
Table 5 differs with the manner of preparation. For instance, if a
portion of the juice is discarded in the manufacture of trimming stock
pulp, as is still the practice of some manufacturers, the variation
from whole tomato pulp will be greater than otherwise and the variation
will increase with the amount of juice discarded.