The answers are the following:
In the next machine was a major who had a little hand like a baby's. He winked at me when the doctor examined his hand, which was between two leather straps that bounced up and down and flapped the stiff fingers
The doctor went to his office in a back room and brought a photograph which showed a hand that had been withered almost as small as the major's, before it had taken a machine course, and after was a little larger.
"Very interesting, very interesting," the major said, and handed it back to the doctor.