The Rudolf Jordan Vintage Reports for Castle Rock Vineyard provide general remarks on the overall weather conditions, duration
of vintage, general yield, condition of grapes, yeast, and sugar in wines as well as a chronological description of the vintage
for a Napa, California vineyard from 1906-1918.
During the vintage of 1905, Rudolf Jordan and Ernest L. Streich, owner of Castle Rock Vineyard, discussed the subject of making
better wines with particular attention directed to the efforts made at the University of California regarding pure yeast and
cooling of musts as advised by Professors Cruess and Bioletti.
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