In his “In Another Country,” the major tells the narrator that he has been coming to the hospital for years with no effect.
This sentence makes evidence how much the major dislikes these machines and how much he doesn't trust them. He has been visitin the hospital for many years seeking to heal himself; however, the machines failed to do that for him, so that he became skeptical about machines.
The suspicion against technology's ability to solve man's problems is a remarkable trait of Moderism to which Hemingway was an adherent.