[Carl Bjerknes] suffered for five years from writer's cramp; tried using his left hand unsuccessfully; was helped by his wife until the strain of doing this and managing a household became too great for her; engaged a secretary who wrote on strips of paper the dictated mathematics, handing each strip to him so that he could see it before proceeding to the next step.
[Carl Bjerknes] suffered para sa limang taon mula sa writer's pulikat; tried gamit ang kanyang kaliwang kamay unsuccessfully; ay tumulong sa pamamagitan ng kanyang asawa hanggang sa strain na ito ng paggawa at pamamahala ng isang sambahayan ay naging masyadong malaki para sa kanya; pansin ng isang sekretarya na wrote on strips ng papel ng dictated matematika, handing bawat pagnakawan sa kanya kaya na siya ay maaaring makita ang mga ito bago magpatuloy sa susunod na hakbang.