The SciencesJanuary 18, 1913
Blueprint Paper
Its Manufacture and Some of its Characteristics
Stories by F. B. Hays
The SciencesNovember 11, 1911
The Manufacture of Permanent Maǵnets
An Industry of Comparatively Recent Growth
Blueprint Paper
Its Manufacture and Some of its Characteristics
The Manufacture of Permanent Maǵnets
An Industry of Comparatively Recent Growth