If it were announced on the Manchester Exchange, or among any other large gathering of intelligentmen, that not one in every hundred of them could see correctlythe appearance of the walls or windows about them, it might cause no small amount of surprise,if not disconcert ; yet such is probably the fact. Millions of persons pass through life unconscious of the change that takes place in the appearance of things around us, yet each time we move an, inch a complete alteration in the appearance of everything is the result.