Otto Wallach Quotes
Top 2 wise famous quotes and sayings by Otto Wallach
Otto Wallach Famous Quotes & Sayings
Discover top inspirational quotes from Otto Wallach on Wise Famous Quotes.
One would think that plants belonging to the same genus would always produce identical or at least similar oils. But this is by no means so.
Most of the oils which are valued as scents are mixtures of substances; only the combined effect of these leads to the known result.