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
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 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
