Lot of 3, Psychology, Science: *** Emminghaus. DIE PSYCHISCHEN STORUNGEN DES KINDESALTERS. Tubingen, 1887. 1st ed. 8vo. viii, 293, [1] pp., illustrated in-text. Period half morocco over marbled boards, boards a bit faded, contents clean, a Very Good example. FIRST BOOK TO BE ENTIRELY DEVOTED TO CHILD PSYCHOLOGY, IN ANY LANGUAGE. *** Stadelmann, Heinrich. SCHULEN FIR NERVENKRANKE KINDER. Berlin, 1903. 8vo. 31, [1] pp. Printed wrappers with edges taped and affixed at gutters with tape (other flaws, see photos), text with some lower corners bumped, light finger soiling to title, else contents excellent being an unopened copy. THE FIRST MONOGRAPH ON ORTHOPSYCHIATRIC SCHOOLING. *** Smyth. ATOMIC ENERGY FOR MILITARY PURPOSES. Princeton, 1945. 8vo, illustrated, hardcover in jacket, jacket with price torn from flap and other light wear, contents clean, as-is. FIRST TRADE EDITION OF THE FIRST TECHNICAL BOOK ON THE ATOMIC BOMB.