—He means a ball having the form of the ellipsoid of the principal axes of which I spoke a moment ago. Moynihan leaned down towards Stephen’s ear and murmured: —What price ellipsoidal balls! chase me, ladies, I’m in the cavalry! His fellow student’s rude humour ran like a gust through the cloister of Stephen’s mind, shaking into gay life limp priestly vestments that hung upon the walls, setting them to sway and caper in a sabbath of misrule. The forms of the community emerged from the gust-blown vestments, the dean of studies, the portly florid bursar with his cap of grey hair, the president, the little priest with feathery hair who wrote devout verses, the squat peasant form of the professor of economics, the tall form of the young professor of mental science discussing on the landing a case of conscience with his class like a giraffe cropping high leafage among a herd of antelopes, the grave troubled prefect of the sodality, the plump roundheaded professor of Italian with his rogue’s eyes. They came ambling and stumbling, tumbling and capering, kilting their gowns for leap frog, holding one another back, shaken with deep false laughter, smacking one another behind and laughing at their rude malice, calling to one another by familiar nicknames, protesting with sudden dignity at some rough usage, whispering two and two behind their hands. The professor had gone to the glass cases on the sidewall, from a shelf of which he took down a set of coils, blew away the dust from many points and, bearing it carefully to the table, held a finger on it while he proceeded with his lecture. He explained that the wires in modern coils were of a compound called platinoid lately discovered by F. W. Martino. He spoke clearly the initials and surname of the discoverer. Moynihan whispered from behind: —Good old Fresh Water Martin! —Ask him, Stephen whispered back with weary humour, if he wants a subject for electrocution. He can have me. Moynihan, seeing the professor bend over the coils, rose in his bench and, clacking noiselessly the fingers of his right hand, began to call with the voice of a slobbering urchin: —Please teacher! This boy is after saying a bad word, teacher. —Platinoid, the professor said solemnly, is preferred to German silver because it has a lower coefficient of resistance by changes of temperature. The platinoid wire is insulated and the covering of silk that insulates it is wound on the ebonite bobbins just where my finger is. If it were wound single an extra current would be induced in the coils. The bobbins are saturated in hot paraffin wax... A sharp Ulster voice said from the bench below Stephen: —Are we likely to be asked questions on applied science? The professor began to juggle gravely with the terms pure science and applied science. A heavybuilt student, wearing gold spectacles, stared with some wonder at the questioner. Moynihan murmured from behind in his natural voice: