Clippings by and about Hammer relating to incandescent lighting

Photograph of incandescent lamps, recto

Photograph of incandescent lamps, verso

Images of different bases for incandescent lamps, recto

Images of different bases for incandescent lamps, verso

From paper filament to carbon, editorial in The Edison Monthly, p. 32

Editorial in The Edison Monthly, p. 31

From paper filament to carbon, editorial in The Edison Monthly, p. 33

From paper filament to carbon, editorial in The Edison Monthly, p. 34

The lamb studios, editorial in The Edison Monthly, p. 36

From paper filament to carbon, editorial in The Edison Monthly, p. 35

Watts in a name, editorial in The Edison Monthly, p. 68

Editorial in The Edison Monthly, p. 67

Watts in a name, editorial in The Edison Monthly, p. 70

Watts in a name, editorial in The Edison Monthly, p. 69

Indicator with work lamp and test lamp, excerpt from the Journal of the Franklin Institute, [f. 1r]

Indicator with work lamp and test lamp, excerpt from the Journal of the Franklin Institute, [f. 1v]

Indicator with work lamp and test lamp, excerpt from the Journal of the Franklin Institute, [f. 2r]

Indicator with work lamp and test lamp, excerpt from the Journal of the Franklin Institute, [f. 2v]

Diagram model of automatic electric circuit opener, sheet 1, verso

Diagram model of automatic electric circuit opener, sheet 1, recto

Diagram model of automatic electric circuit opener, sheet 2, verso

Diagram model of automatic electric circuit opener, sheet 2, recto

Diagram model of automatic electric circuit opener, sheet 3, verso

Diagram model of automatic electric circuit opener, sheet 3, recto

Diagram model of automatic electric circuit opener, sheet 4, verso

Diagram model of automatic electric circuit opener, sheet 4, recto

Patent record for William H. Sawyer, [p. 1]

Patent record for William H. Sawyer, p. 2

Patent record for William H. Sawyer, p. 3

Patent record for William H. Sawyer, p. 4

Patent record for William H. Sawyer, p. 5

Patent record for William H. Sawyer, [p. 6]

Copy of clipping highlighting advantages of the Edison incandescent light over gas and other illuminants, recto

Copy of clipping highlighting advantages of the Edison incandescent light over gas and other illuminants, verso

Clipping highlighting advantages of the Edison incandescent light over gas and other illuminants, recto

Clipping highlighting advantages of the Edison incandescent light over gas and other illuminants, verso

Clipping highlighting advantages of the Edison incandescent light over gas and other illuminants, recto

Clipping highlighting advantages of the Edison incandescent light over gas and other illuminants, verso