Culture flasks were so big, that microscope objective lenses couldn't come reasonably close to the subject. Hayflick told his Leitz sales representative about the problem, and the sales rep returned ...

In 1948 Seibert left Leitz and undertook the task of designing ... Emoskop : this marvel is a telescope, a microscope and three magnifier in a pocket package only 50mm long. It is the optical ...