Joe Carson grinned broadly and again reread his letter to the editor of Galactic Adventures . Galactic Adventures was Joe's favorite science-fiction magazine and he had spent many happy hours roaming the cold of space and inventing ponderous machines through the medium of its pages. The latest issue lay open on the desk before him, its garish cover mercifully hidden from view. The cover was Joe's main reason for writing his missive, although he had several minor motives, not the least of them be