Miscellaneous biographical material concerning Hammer, relating to his aeronautical activities, radium etc

Memo of certain aeronautical activities of Major William J. Hammer, Con. Eng., f. 5r

Memo of certain aeronautical activities of Major William J. Hammer, Con. Eng., f. 5v

Memo of certain aeronautical activities of Major William J. Hammer, Con. Eng., f. 6r

Memo of certain aeronautical activities of Major William J. Hammer, Con. Eng., f. 6v

Memo of certain aeronautical activities of Major William J. Hammer, Con. Eng., f. 7r

Memo of certain aeronautical activities of Major William J. Hammer, Con. Eng., f. 7v

Memo of certain aeronautical activities of Major William J. Hammer, Con. Eng., f. 8r

Memo of certain aeronautical activities of Major William J. Hammer, Con. Eng., f. 8v

Memo of certain aeronautical activities of Major William J. Hammer, Con. Eng., f. 9r

Memo of certain aeronautical activities of Major William J. Hammer, Con. Eng., f. 9v

Introduction to Radium, [f. 1r]

Introduction to Radium, [f. 1v]

Introduction to Radium, f. 2r

Introduction to Radium, f. 2v

Introduction to Radium, f. 3r

Introduction to Radium, f. 3v

Introduction to Edisonia, [f. 1r]

Introduction to Edisonia, [f. 1v]

Introduction to Edisonia, f. 2r

Introduction to Edisonia, f. 2v

Introduction to Edisonia, f. 3r

Introduction to Edisonia, f. 3v

Introduction to Edisonia, f. 4r

Introduction to Edisonia, f. 4v

Portrait of William J. Hammer and short biographical note, recto

Portrait of William J. Hammer and short biographical note, verso

Document concerning the brief history of The William J. Hammer Historical Collection of Incandescent Electric Lamps 1878-1913, recto

Document concerning the brief history of The William J. Hammer Historical Collection of Incandescent Electric Lamps 1878-1913, verso

Photograph of medals awarded to William J. Hammer, recto

Photograph of medals awarded to William J. Hammer, verso

Photograph of different exhibits in The William J. Hammer Historical Collection of Incandescent Electric Lamps, recto

Photograph of different exhibits in The William J. Hammer Historical Collection of Incandescent Electric Lamps, verso

Photograph of lamp photographs from The William J. Hammer Collection of Edisonia, recto

Photograph of lamp photographs from The William J. Hammer Collection of Edisonia, verso

Photograph of samples of materials used by Thomas A. Edison in his early experiments, recto

Photograph of samples of materials used by Thomas A. Edison in his early experiments, verso

Photograph of A Very Early Broadcast, 1889, Before the Days of Radio, recto

Photograph of A Very Early Broadcast, 1889, Before the Days of Radio, verso