The doctor rekindled the light in the cylinder; the spiral became heated; the current of hydrogen came in a few minutes, and the gas dilated; but the balloon did not stir an inch.
Joe looked on uneasily, but kept silent.
“Joe!” said the doctor.
Joe made no reply.
“Joe! Don’t you hear me?”
Joe made a sign that he heard; but he would not understand.
“Do me the kindness to throw out some of that quartz!”
“But, doctor, you gave me leave—”
“I gave you leave to replace the ballast; that was all!”
“But—”