—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..