. Bulletin of the Department of Agriculture. Agriculture; Agriculture. UNITED STATES DEPARTMENT OF AGRICULTURE n'MI bulletin No. 773 J •^w^ ^^^s?'^?^^- Contribution from the Bureau of Chemistry CARL L. ALSBERG, Chief. jyJ^'^^U Washington, D. C. PROFESSIONAL PAPER May 29,1919 CHEMICAL ANALYSES OF LOGAN BLACKBERRY (LOGANBERRY) JUICES. Bj^ R. S. HOLLINGSHEAD,' Assistant Chemist, San Francisco Food and Drug Inspection Station. CONTENTS. The Logan blackberry (Loganberry) 1 Uses of the Logan blackberry 2 Manufacture of Logan blackberry juice 2 Purpose of investigation 3 Preparation of the analy
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. UNITED STATES DEPARTMENT OF AGRICULTURE n'MI bulletin No. 773 J •^w^ ^^^s?'^?^^- Contribution from the Bureau of Chemistry CARL L. ALSBERG, Chief. jyJ^'^^U Washington, D. C. PROFESSIONAL PAPER May 29,1919 CHEMICAL ANALYSES OF LOGAN BLACKBERRY (LOGANBERRY) JUICES. Bj^ R. S. HOLLINGSHEAD,' Assistant Chemist, San Francisco Food and Drug Inspection Station. CONTENTS. The Logan blackberry (Loganberry) 1 Uses of the Logan blackberry 2 Manufacture of Logan blackberry juice 2 Purpose of investigation 3 Preparation of the analytical samples 3 Methods of analysis 4 Results of analyses 6 Discussion of results of analyses 12 THE LOGAN BLACKBERRY (LOGANBERRY). The Logan blackberry, which, is generally known as the Logan- berry^, originated in 1881, on the grounds of Judge J. H. Logan, of Santa Clara, Cal., who grew it from the seed of the Aughinbaugh blackberry. The seedling was supposed to be the result of hybridiza- tion between the blackberry and a red raspberry, presumably the Red Atwerp, which grew beside the blackberry parent ^' ^' *. Recent investigations, however, throw doubt on this view and indicate that it is a variety of the trailing blackberry common to the Pacific coast.^ The plant is an exceedingly robust grower, showing unique foliage and cane growth, as well as fruit. The fruit, shaped like the common blackberry, is sometimes as long as IJ inches and of a dark color, similar to that of a dark red raspberry.^ The berry has a characteris- tic flavor, resembling that of raspberries, both red and black, but more acid than either. A closely-related berry, introduced by Burbank,^ is the "Phenomenal," which is very similar to the Logan blackberry, ' rreerry julcas reported in this bulletin. * \, ¥,. J. The California Fruits and How to Grow Them (1914), p. 417. » Shinn, C. IL Garden and Forest (1894), 7: 4fi.'>-6. * Gardner, V. K. Biennial Crop Pest and JlorticuUural Rep
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