Let us watch him on an ordinary day. After eight hours' sleep, he rises in time to breakfast at eight o'clock, goes round the Institution to see that all is in order, and descends into the laboratory, puts on a large white apron, the stains and holes in which tell of previous service, and is busy among his pieces of apparatus. The faithful Anderson, an old soldier, who always did exactly what he was told, and nothing more,[5] is waiting upon him; and as thought flashes after thought through his eager--perhaps impatient--brain, he twists his wires into new shapes, and re-arranges his magnets and batteries. Then some conclusion is arrived at which lights up his face with a gleam of satisfaction, but the next minute a doubt comes across that expressive brow--may the results not be due to something else yet imperfectly conceived?--and a new experiment must be devised to answer that. In the meantime perhaps one of his little nieces has been left in his charge. She sits as quiet as a mouse with her needlework; but now and then he gives her a nod, or a kind word, and throwing a little piece of potassium on to a basin of water for her amusement, he shows her the metal bursting into purple flame, floating about in fiery eddies, and the crack of the fused globule of potash at the end. Presently there is handed to him the card of some foreign _savant_, who makes his pilgrimage to the famous Institution and its presiding genius; he puts down his last result on a slate, comes upstairs, and, disregarding the interruption, chats with his visitor with all cordiality and openness. Then to work again till dinner-time, at half-past two. In the afternoon he retires to his study with its plain furniture and the india-rubber tree in the window, and writes a letter full of affection to some friend, after which he goes off to the council meeting of one of the learned bodies. Then back again to the laboratory, but as evening approaches he goes upstairs to his wife and niece, and then there is a game at bagatelle or acting charades; and afterwards he will read aloud from Shakspeare or Macaulay till it is time for supper and the simple family worship which now is not liable to the interruptions that generally prevent it in the morning. And so the day closes. Or if it be a fine summer evening, he takes a stroll with his wife and the little girl to the Zoological Gardens, and looks at all the new arrivals, but especially the monkeys, laughing at their tricks till the tears run down his cheeks.