Chp 11

From the text:

Greedily she clamoured for ever larger, ever more frequent doses. Dr. Shaw at first demurred; then let her have what she wanted. She took as much as twenty grammes a day.

"Which will finish her off in a month or two," the doctor confided to Bernard. "One day the respiratory centre will be paralyzed. No more breathing. Finished. And a good thing too. If we could rejuvenate, of course it would be different. But we can't."