The sensations and the feelings must necessarily be referred back to the flour, where they exist, weak and pale, it is true, and not concentrated, as in the brain._' '_We may not_,' Dr.Tyndall adds, by way of a gloss to this, '_be able to taste or smell alcohol in a tub of fermented cherries, but by distillation we obtain from them concentrated Kirschwasser.

Hence Ueberweg's comparison of the brain to a still, which concentrates the sensation and feeling pre-existing, but diluted, in the food._' Let us now compare this with the following.

'_It is no explanation_,' says Dr.Tyndall, '_to say that objective and subjective are two sides of one and the same phenomenon.

Why should phenomena have two sides?
There are plenty of molecular motions which do not exhibit this two-sidedness.

Does water think or feel when it runs into frost-ferns upon a window pane?
If not, why should the molecular motions of the brain be yoked to this mysterious companion consciousness ?_' Here we have two views, diametrically opposed to each other, the one suggested with approval, and the other implied as his own, by the same writer, and in the same short essay.