The seventh tub shook gently, stimulating the hypothalamic region of Eric's brain for the first time in almost two centuries. After a time, his limbs trembled and his body began to shiver. The liquid in which he floated boiled off at a temperature still far below that which would permit his body to function. By the time all the liquid was gone he had uncurled and lay at the bottom of the tub. Now his heart pumped three hundred times a minute, generating warmth and activating his central nervous