Stories by Howard Grubb

The SciencesAugust 2, 1890

Heliostat for the Smithsonian Institution, Washington

Howard Grubb

The SciencesJuly 10, 1886

Telescopic Objectives and Mirrors: Their Preparation and Testing

Howard Grubb

The SciencesJuly 3, 1886

Telescopic Objectives and Mirrors: Their Preparation and Testing

Howard Grubb