154 MISC. PUB. 190, U.S. DEPT. OF AGRICULTURE 
“Damage” means any injury which materially 
affects the appearance of the lot or causes appreciable 
waste in the ordinary preparation for use. 
“Serious damage” means any injury not including 
badly misshapen sweetpotatoes, which seriously affects 
the appearance of the lot, or causes a waste of more 
than 20 percent, by weight, in the ordinary prepara- 
tion for use. Black rot shall be considered as serious 
damage. 
* Diameter” means the greatest dimension at right 
angles to the longitudinal axis. 
* Smooth’ means that in addition to other defects 
which cause roughness, sweetpotatoes shall be free 
from prominent veining. 
39 
UNITED STATES STANDARDS FOR CANNING 
TOMATOES 
(Effective Mar. 1, 1926) 
INTRODUCTION 
Grades for canning tomatoes which will provide a 
definite basis for contracts between the canner and 
the grower are meeting with increasing favor. Such 
grades must recognize variations in commercial value 
and still be simple enough to be practical in actual 
operation. 
In recommending the attached United States grades 
the United States Department of Agriculture has 
attempted to formulate the views of leading repre- 
sentatives of both growers and canners and careful 
studies of present practices show them to be practical. 
However, as the idea of grading tomatoes for cannery 
purposes is new a further word of explanation seems 
desirable. 
It should be understood at the outset that the only 
grading required of the grower is the removal of 
culls. Such tomatoes should be left in the field. It 
is not intended that the grower sort the tomatoes 
into U.S. No. 1 and U.S. No. 2 grades. The proposed 
grades provide a basis for sampling the tomatoes as 
they are delivered to the cannery. 
The application of these grades requires the services 
of private ofr official inspectors to determine the 
amounts of each grade in the various loads of toma- 
tces. Such inspectors must be capable, efficient, and 
