JUNIOR SCIENCECRAFT MICROSCOPE MANUAL copyright 1935
PORTER ELECTRIC CONSTRUCTION SET No. 75 copyright 1956
PORTER SECRETS OF NATURE, SEE SPECIMENS COME TO LIFE copyright 1957
PORTER SENIOR MICROCRAFT MANUAL, EXPLORE THE WONDERS OF THE INVISIBLE WORLD copyright 1956
SCIENCECRAFT POLAROID JUNIOR INSTRUCTION MANUAL copyright 1937
THE STORY OF ATOMIC ENERGY WITH SAFE, INTERESTING EXPERIMENTS copyright 1947
THE STORY OF ATOMIC ENERGY WITH SAFE, INTERESTING EXPERIMENTS copyright 1955
THE WONDERS OF SCIENCE, CHEMCRAFT, MICROCRAFT 1958
YOUR WORLD OF SCIENCE copyright 1957
JUNIOR SCIENCECRAFT MICROSCOPE MANUAL
copyright 1935
PORTER ELECTRIC CONSTRUCTION SET No. 75
copyright 1956
PORTER SECRETS OF NATURE, SEE SPECIMENS COME TO LIFE
copyright 1957
cover used in 1958
cover used in 1959
PORTER SENIOR MICROCRAFT MANUAL, EXPLORE THE WONDERS OF THE INVISIBLE WORLD
copyright 1956
cover used in 1958
cover used in 1959
SCIENCECRAFT POLAROID JUNIOR INSTRUCTION MANUAL copyright 1937
THE STORY OF ATOMIC ENERGY WITH SAFE, INTERESTING EXPERIMENTS copyright 1947
THE STORY OF ATOMIC ENERGY WITH SAFE, INTERESTING EXPERIMENTS copyright 1955
THE WONDERS OF SCIENCE, CHEMCRAFT, MICROCRAFT 1958
single sheet folded
front
back
YOUR WORLD OF SCIENCE
copyright 1957
