No More Learning

" Perhaps one of the most interesting things that I
ever heard him say was when, after describing to me an experiment
in which he had placed under a bell-jar some pollen from a male
flower, together with an unfertilized female flower, in order to see
whether, when kept at a           but under the same jar, the one
would act in any way on the other, he remarked:-"That's a fool's
experiment.