A recent French writer on the hygiene of the sight has brought forward striking evidence in support of his statement, that in our time the sense of sight is growing markedly weaker. The number of the near-sighted is augmenting, as is also the number of those who become 'far-sighted' before old age. Cases of debility and disease of the eyes seem to be multiplying at a rate which should awaken general attention to this matter. The causes are to be found in the neglect, often the hurtful management, of the eyesight of children; in the influence of improperly regulating artificial light; and in the injury done by bad printer's ink and paper. In the education of the child's eyesight, _acuteness_ of vision is one of the first objects to be sought for. That this is largely a matter of training is apparent from the fact that persons in certain professions can readily distinguish objects too small or too distant for ordinary eyes. Children brought up in the country or at the sea-side, have a power of vision unknown to city children, with their limited range of observation. But it is not only necessary that the eyes should be able to make out the forms of distant or small objects, but that they should be quick to detect shades of color and delicacies of outline. The child should be stimulated and encouraged to make efforts in this direction. Here, also, there is room for the skill of the intelligent toy-maker, for toys can be made very useful educators. One of the forms of sensorial _memory_ which it is most desirable to develope is that of objects seen, that is to say, the fixing in the thoughts, to be brought up before the mind's eye when wanted, the recollection of visual impressions. This embraces the memory of forms, of dimensions, of the relations between various objects and between different parts of the same object, and of colors. When applied to places it is what is known as _local_ memory, applied to the human face, it is the memory of _physiognomy_; applied to objects, it is _graphic_ or _descriptive_ memory; applied to colors, it is _chromatic_ memory. _Local_ memory is sometimes developed to an extraordinary degree. It is only necessary for some persons to have once traversed a locality, a street, a city, in order to preserve of it a most minute and vivid recollection. This topographical memory is enjoyed by a number of the inferior animals; the elephant, the dog, and the horse, for instance, are well-known as being capable of noticing a road taken and of returning by it, of recognising readily a place once seen, and of showing a tendency to stop of their own accord at places where they have been arrested or kept. This local memory, useful as it is to every one, is necessary to the painter who draws upon it for the elements of his artistic creations.