"Then," said the master, "you have a _casus belli_ that is actually true, and if you can make Conrad admit his guilt I will exchange your mark for his." Bruno saluted again and started to leave. Then he turned back and said, "But Conrad is two kilograms heavier than I am, and he may not admit it." "Then," said the teacher, "you must know that I cannot exchange the marks, for victory in a fight compensates for the fault that caused it. But if you wish I will change the marks now, but then you cannot fight." "But I wish to fight," said Bruno, "and so does Conrad. We arranged it before recitation that he was to stick me with the pin." "Such diplomacy!" exulted the master when the lad had gone, "and to think that they can only be chemists!" ~3~ As the evening hour drew near which I had set for my call on the first of the potential mothers assigned me by the Eugenic Staff, I re-read the rules for my conduct: "On the occasion of this visit you must wear a full dress uniform, including all orders, decorations and badges of rank and service to which you are entitled. This is very important and you should call attention thereto and explain the full dignity and importance of your rank and decorations. "When you call you will first present the card of authorization. You will then present your identification folder and extol the worth and character of your pedigree. "Then you will ask to see the pedigree of the woman, and will not fail to comment favourably thereon. If she be already a mother you will inquire in regard to her children. If she be not a mother, you will supplicate her to speak of her potential children. You will extol the virtue of her offspring--or her visions thereof,--and will not fail to speak favourably of their promise of becoming great chemists whose service will redound to the honour of the German race and the Royal House. "After the above mentioned matters have been properly spoken of, you may compliment the mother upon her own intelligence and fitness as a mother of scientists. But you will refrain from all reference to her beauty of person, lest her thoughts be diverted from her higher purpose to matters of personal amours. "You will not prolong your call beyond the hours consistent with dignity and propriety, nor permit the mother to perceive your disposition toward her." Surely nothing in such formal procedure could be incompatible with my own ideals of propriety. Taking with me my card of authorization bearing the name "Frau Karoline, daughter of Ernest Pfeiffer, Director of the Perfume Works," I now ventured to the Level of Maternity.