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 …

- Otto Wallach

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

In organic chemistry, we have learnt to derive from compounds containing only carbon and hydrogen, i.e. from the hydrocarbons, all other types of com…

- Otto Wallach

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 …

- Otto Wallach

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

May the work for the further development of chemical science, which has its strongest roots in this beautiful, strong and hard-working country of Swe…

- Otto Wallach