Brrr-- it's cold in Miami today so I'm staying inside today working on uploading fresh versions of my perfumery lecture for the Natural Perfumery Institute.  Since 2007, I've been the only perfumery instructor to offer extra help with the course in a series of explanatory lectures.  The recordings are available to the Online Interactive Option students as a supplemental bonus for their expanded educational materials that includes videos and much more, including my detailed feedback on their assignments and exercises. I'll be here all day to answer anyone's questions about natural perfumery topics, and maybe you'll see something in the list of lectures, below, that will give you an idea for a question.
List of Lectures Available to the Online Interactive Students of the Natural Perfumery Institute.

List of Lectures Available to the Online Interactive Students of the Natural Perfumery Institute.