Magna-Bar / Magna-rule Magnifiers:
Designed by Bausch & Lomb to double the height of letters, lie directly on the page and require no focusing. Magnifies two lines of type at a time and is easily moved down the page at the user's reading speed.
The 5 1/4" Magna-Bar covers the full page width of most books.
The Magna-Rule is ten inches long and has an eight-inch scale ruler, useful with tabulated data because it can serve as a linear guide.
