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. Jordan later authored "Quality In Dry Wines Through Adequate Fermentations by Means of Defecation, Aeration, Pure Yeast, Cooling and Heating: A Manual for Progressive Winemakers in California" (1911) based on oberservations he made at Castle Rock. Castle Rock Vineyard, located in Napa County, California was sold in March 1921 to H.G. March.
From the description of Rudolf Jordan Vintage Reports for Castle Rock Vineyard, 1901-1935 (University of California, Davis). WorldCat record id: 383454364
