U. S. Department of Agriculture,
Bureau of Chemistry,
_Washington, D. C., July 15, 1908_.
Sir: I have the honor to submit for your approval a report made by
Inspector Bitting of experimental work on the spoilage of tomato
ketchup, the conditions contributing thereto, methods of prevention,
the action of preservatives, and the length of time that the product
will keep under varying conditions of manufacture and temperature, both
before and after opening. Every effort has been made to conduct the
work in a practical way, and the results obtained can not fail to be of
interest and profit both to the manufacturer and consumer. I recommend
that this report be published as Bulletin No. 119 of the Bureau of
Chemistry.
Respectfully, H. W. Wiley,
_Chief_.
Hon. James Wilson,
_Secretary of Agriculture_.