It has been possible to trace historically back to a very early age the taxes which were imposed on medicines, spices and similar substances in German towns. Thus, for instance, one finds that in the year 1500, thirteen, in 1540,… — Otto Wallach Copy Share Image
In bitter almond oil, like in a great number of other substances that previously had been counted among the 'aromatic compounds' on behalf of… — Otto Wallach Copy Share Image
As soon as we can wrest from Nature the secret of the internal structure of the compounds produced by her, chemical science can then… — Otto Wallach Copy Share Image
As soon as chemists have a definite conception of the internal structure of the molecule of an organic compound, they are able to tackle… — Otto Wallach Copy Share Image
As soon as science has solved one problem, new ones arise. This is the essence of science, and it applies, of course, also to… — Otto Wallach Copy Share Image
It has been possible to trace historically back to a very early age the taxes which were imposed on medicines, spices and similar substances… — Otto Wallach Copy Share Image
One would think that plants belonging to the same genus would always produce identical or at least similar oils. But this is by no… — Otto Wallach Copy Share Image
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,… — Otto Wallach Copy Share Image
From a very early age onwards, people's attention had been attracted to the volatile substances, characterized by strong smells or flavours, which are among… — Otto Wallach Copy Share Image
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 Copy Share Image
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,… — Otto Wallach Copy Share Image
