It is important to make a complete distinction between an exhibition intended for the general public and that intended for advanced students in schools, colleges and universities. The confusion of these two kinds of exhibition is the cause of the failure of many museums and of the dislike with which most people regard a visit to them. The public museum--metropolitan or local--should not include in its purpose the "academic" instruction of schoolboys and university students. That requires a different kind of museum, which is (or should be) provided by the school or university, though, of course, the students should also visit the more popular museums. The funds and staff and space required for the one are not sufficient for both. If both are attempted, the unpopular academic, or scholars', exhibition will get the upper hand and suppress the other, since it is a far easier thing to carry out successfully (for the class aimed at) than is the carefully planned exhibition intended for the "edification" of the greater public. The university museum aims at imparting a much greater amount of detailed and elaborate information than does the great public museum, and requires from the student who uses it a special previous study of the subject, and an exceptional amount of attention and pains in examining the objects exhibited. Too many of the public museums of Europe aim at the "instruction" of the special student rather than at the "edification" of the general public, whilst most aim at nothing at all except showing, without explanation or comment, a vast mass of specimens or pictures, at the sight of which the patient but bored public gapes with wonder. The public galleries of the Natural History Museum in London have been arranged more distinctly with a view to the edification of the public than those of any other museum which I know. But they still contain too large a number of specimens, and still require an immense amount of work in weeding, selection and labelling, and in deliberately making the specimens exhibited tell a tale which is worth remembering, and can be remembered. Except in the case of the larger specimens, and especially those of fossilized skeletons and shells of extinct animals, it must be remembered that the bulk of the specimens (and, indeed, all the valuable skins of animals and birds, and the vast series of insects and such small things) in that, as in every other large museum, are contained in cabinets protected from the destructive action of light, and arranged for the most part in rooms to which access is obtained only by serious workers after special application. The fishes and other animals preserved in alcohol are kept in a special fire-proof "spirit-building."