Detroit. Public schools. Dept. of instruction, teacher training and research. [from old catalog], Kepler, Frank Roy. [from old catalog] · Detroit · leaf 25
CD W ^ o / s Vj ^ t … In laying out the larger cyhnder, indicating the center ofthe opening, at 1 ^^, erect a perpendicular to the straight hne rsrepresenting the circumference of the cylinder. From l^^ set 25
Projection
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
