We hope our readers will continue to study Mr. Ruskin’s exposition of the “Vaulted Book” in _Mornings in Florence_: it is wonderfully full of teaching and suggestion. Our immediate concern is with the seven mythic figures representing the natural sciences, and with the figure of the Captain-teacher of each. First we have Grammar, a gracious figure teaching three Florentine children; and, beneath, Priscian. Next, Rhetoric, strong, calm, and cool; and below, the figure of Cicero with a quite beautiful face. Next, Logic, with perfect pose of figure and lovely countenance; and beneath her, Aristotle--intense keenness of search in his half-closed eyes. Next, Music, with head inclined in intent listening to the sweet and solemn strains she is producing from her antique instrument; and underneath, Tubal Cain, not Jubal, as the inventor of harmony--perhaps the most marvellous record that Art has produced of the impact of a great idea upon the soul of a man but semi-civilised. Astronomy succeeds, with majestic brow and upraised hand, and below her, Zoroaster, exceedingly beautiful--“the delicate Persian head made softer still by the elaborately wreathed silken hair.” Next, Geometry, looking down, considering some practical problem, with her carpenter’s square in her hand, and below her, Euclid. And lastly, Arithmetic, holding two fingers up in the act of calculating, and under her, Pythagoras wrapped in the science of number. “The thoughts of God are broader than the measures of man’s mind.”