1.
In organic chemistry, we have learnt to derive from compounds containing only carbon and hydrogen, i.e. from the hydrocarbons, all other types of combinations, such as alcohols, aldehydes, ketones, acids, etc.
Otto Wallach
2.
As soon as science has solved one problem, new ones arise. This is the essence of science, and it applies, of course, also to the field of essential oils.
Otto Wallach
3.
As soon as chemists have a definite conception of the internal structure of the molecule of an organic compound, they are able to tackle the task of producing these substances by artificial methods, i.e. by synthesis, as we call it.
Otto Wallach
4.
Most of the oils which are valued as scents are mixtures of substances; only the combined effect of these leads to the known result.
Otto Wallach
5.
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.
Otto Wallach
6.
May the work for the further development of chemical science, which has its strongest roots in this beautiful, strong and hard-working country of Sweden, continue to flourish in the future, for the promotion of culture and the benefit of mankind.
Otto Wallach
