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Contributor Notes
Received for publication April 8, 1981. This research was supported in part by grants No. A6697 and A5951 of the Natural Sciences and Engineering Research Council of Canada, and by the Ontario Ministry of Agriculture and Food. We thank Glenna Rebick, Larry Pyear and Dean Louttit for technical assistance, and Walter Hellyer of Waterford, Ontario for supplying the ginseng roots.
The cost of publishing this paper was defrayed in part by the payment of page charges. Under postal regulations, this paper therefore must be hereby marked advertisement solely to indicate this fact.
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