[Collection of 51 plate glass negatives illustrating astronomical instrument making by John Alfred Brashear Co. and their successors, J.W. Fecker Co. 1880s-1930s. 1 box. Note that a set of prints (SM neg. nos. 59/91 to 109/91), taken from these negs., is available in archive collection at MS547] Collection of Glass Negatives Illustrating Astronomical Instrument Making 1880-1939