In the Deutsches Museum, February there is a treatise by a very fine and bright mind,a the late Wizenmann,h whose early death is to be lamented, in which he disputes our authority to make an inference from a need to the objective reality of its object; and he elucidates his pointc by the example of a man in love, who, having become infatuated with an idea of beauty that is merely his own chimera, wanted to infer that such an object actually exists somewhere.