Miscellaneous correspondence, many concerning Hammer's lectures on radium

Photograph of man flying in aeroplane, recto

Photograph of man flying in aeroplane, verso

Photograph of a man flying in a glider while it is being towed by another man, recto

Photograph of a man flying in a glider while it is being towed by another man, verso

Letter from M. B. Sellers to William J. Hammer, [f. 1r]

Letter from M. B. Sellers to William J. Hammer, [f. 1v]

Letter from M. B. Sellers to William J. Hammer, p. 2

Letter from M. B. Sellers to William J. Hammer, p. 3

Letter from M. B. Sellers to William J. Hammer, recto

Letter from M. B. Sellers to William J. Hammer, verso

Articles and notes on aeronautics, recto

Articles and notes on aeronautics, verso

Letter from M. B. Sellers to William J. Hammer, [f. 1r]

Letter from M. B. Sellers to William J. Hammer, [f. 1v]

Letter from M. B. Sellers to William J. Hammer, f. 2r

Letter from M. B. Sellers to William J. Hammer, f. 2v

Extract detailing the appointment of William J. Hammer as Major of the National Army, recto

Extract detailing the appointment of William J. Hammer as Major of the National Army, verso

Letter from William J. Hammer to Major General Peyton C. March, recto

Letter from William J. Hammer to Major General Peyton C. March, verso

Memorandum from Lytle Brown to the Chief of Staff, recto

Memorandum from Lytle Brown to the Chief of Staff, verso

Written telegram message addressed to William J. Hammer, recto

Written telegram message addressed to William J. Hammer, verso

Correspondence concerning the Arc Lamp, recto

Correspondence concerning the Arc Lamp, verso

Invitation addressed to William J. Hammer, recto

Invitation addressed to William J. Hammer, verso

Copy of letter from Harry A. Lee to William J. Hammer, recto

Copy of letter from Harry A. Lee to William J. Hammer, verso

Copy of letter from John Uno Sebenius, William A. McGonagle, David L. Fairchild, L. B. Hovland, and W. N. Merriam to William J. Hammer, recto

Copy of letter from John Uno Sebenius, William A. McGonagle, David L. Fairchild, L. B. Hovland, and W. N. Merriam to William J. Hammer, verso

Letter from Henry G. Tyrrell to William J. Hammer, recto

Letter from Henry G. Tyrrell to William J. Hammer, verso

Letter from Jos. Jablonower to William J. Hammer, recto

Letter from Jos. Jablonower to William J. Hammer, verso

Letter from John B. Lunger to William J. Hammer, recto

Letter from John B. Lunger to William J. Hammer, verso

Letter from William J. Hammer to James I. Ayer, [f. 1r]

Letter from William J. Hammer to James I. Ayer, [f. 1v]

Letter from William J. Hammer to James I. Ayer, f. 2r

Letter from William J. Hammer to James I. Ayer, f. 2v

Letter from William Brophy to William J. Hammer, recto

Letter from William Brophy to William J. Hammer, verso

Note detailing approval or adoption of the National Electrical Code by different associations, recto

Note detailing approval or adoption of the National Electrical Code by different associations, verso

Preface, [f. 1r]

Preface, [f. 1v]

Preface, f. 2r

Preface, f. 2v

Preface, f. 3r

Preface, f. 3v

Preface, f. 4r

Preface, f. 4v

Preface, f. 5r

Preface, f. 5v

Letter from electrical inspector (unidentified name) to William J. Hammer, recto

Letter from electrical inspector (unidentified name) to William J. Hammer, verso

Amendments to the National Code of Rules for Electrical Construction and Operation, f. 1r

Amendments to the National Code of Rules for Electrical Construction and Operation, f. 1v

Amendments to the National Code of Rules for Electrical Construction and Operation, f. 2r

Amendments to the National Code of Rules for Electrical Construction and Operation, f. 2v

Amendments to the National Code of Rules for Electrical Construction and Operation, f. 3r

Amendments to the National Code of Rules for Electrical Construction and Operation, f. 3v

Letter from Frederick R. Hutton to William J. Hammer, [f. 1r]

Letter from Frederick R. Hutton to William J. Hammer, [f. 1v]

Letter from Frederick R. Hutton to William J. Hammer, f. 2r

Letter from Frederick R. Hutton to William J. Hammer, f. 2v

Correspondence from Frederick R. Hutton, recto

Correspondence from Frederick R. Hutton, verso

Letter from Francis Jehl to William J. Hammer, [f. 1r]

Letter from Francis Jehl to William J. Hammer, [f. 1v]

Letter from Francis Jehl to William J. Hammer, f. 2r

Letter from Francis Jehl to William J. Hammer, f. 2v

Copy of letter from Lord Rutherford to William J. Hammer, recto

Copy of letter from Lord Rutherford to William J. Hammer, verso

Letter from Henri Becquerel, verso

Letter from Henri Becquerel, recto

Letter from T. W. Corwin to William J. Hammer, recto

Letter from T. W. Corwin to William J. Hammer, verso

Letter from J. A. Kelsey to William J. Hammer, recto

Letter from J. A. Kelsey to William J. Hammer, verso

Correspondence from F. C. Van Dyck, recto

Correspondence from F. C. Van Dyck, verso

Letter from A. D. Burgesser to William J. Hammer, recto

Letter from A. D. Burgesser to William J. Hammer, verso

Letter addressed to William J. Hammer, recto

Letter addressed to William J. Hammer, verso

Letter from electrical inspector (unidentified name) to William J. Hammer, recto

Letter from electrical inspector (unidentified name) to William J. Hammer, verso

Letter addressed to William J. Hammer, recto

Letter addressed to William J. Hammer, verso

Letter from Winslow Goodwin to William J. Hammer, recto

Letter from Winslow Goodwin to William J. Hammer, verso

Letter from William E. Saunders to George H. Guy, recto

Letter from William E. Saunders to George H. Guy, verso

Letter from George H. Guy to William J. Hammer, recto

Letter from George H. Guy to William J. Hammer, verso

Letter from George B. Shattuck to William J. Hammer, recto

Letter from George B. Shattuck to William J. Hammer, verso

Letter from George B. Shattuck to William J. Hammer, recto

Letter from George B. Shattuck to William J. Hammer, verso

Letter from John Meigs to William J. Hammer, recto

Letter from John Meigs to William J. Hammer, verso

Copy of statement from John Meigs concerning William J. Hammer and his lecture on radium, recto

Copy of statement from John Meigs concerning William J. Hammer and his lecture on radium, verso

Document providing overview of William J. Hammer's lecture on radium and subsequent events, recto

Document providing overview of William J. Hammer's lecture on radium and subsequent events, verso

Copy of letter from Edward Rynearson to William J. Hammer, recto

Copy of letter from Edward Rynearson to William J. Hammer, verso

Letter from William H. Wahl to William J. Hammer, recto

Letter from William H. Wahl to William J. Hammer, verso

Letter from William H. Wahl to William J. Hammer, recto

Letter from William H. Wahl to William J. Hammer, verso

Letter from William Hallock to William J. Hammer, recto

Letter from William Hallock to William J. Hammer, verso

Letter from Leonard J. Gordon to William J. Hammer, recto

Letter from Leonard J. Gordon to William J. Hammer, verso

Letter addressed to William J. Hammer, recto

Letter addressed to William J. Hammer, verso

Letter from Gilbert H. Grosvenor to William J. Hammer, recto

Letter from Gilbert H. Grosvenor to William J. Hammer, verso

Letter from J. B. Pond Lyceum Bureau to William J. Hammer, recto

Letter from J. B. Pond Lyceum Bureau to William J. Hammer, verso

Copy of letter from Harry A. Lee to William J. Hammer, recto

Copy of letter from Harry A. Lee to William J. Hammer, verso

Copy of letter from E. H. Schuyler to William J. Hammer, recto

Copy of letter from E. H. Schuyler to William J. Hammer, verso

Copy of statement from Jno. C. Diehl concerning William J. Hammer and his lecture on radium, recto

Copy of statement from Jno. C. Diehl concerning William J. Hammer and his lecture on radium, verso

Letter from A. D. Burgesser to William J. Hammer, recto

Letter from A. D. Burgesser to William J. Hammer, verso

Letter from Alfred Williams Anthony to William J. Hammer, recto

Letter from Alfred Williams Anthony to William J. Hammer, verso

Letter from Oscar S. Kriebel to William J. Hammer, recto

Letter from Oscar S. Kriebel to William J. Hammer, verso

Copy of letter from Oscar S. Kriebel to William J. Hammer, recto

Copy of letter from Oscar S. Kriebel to William J. Hammer, verso

Copy of letter from M. S. Wraid to William J. Hammer, recto

Copy of letter from M. S. Wraid to William J. Hammer, verso

Letter from Willy Meyer to William J. Hammer, recto

Letter from Willy Meyer to William J. Hammer, verso

Written note from William J. Hammer concerning his radium tests, recto

Written note from William J. Hammer concerning his radium tests, verso

Letter from Arthur E. Kennelly, L. A. Ferguson, Philip G. Gossler, F. A. C. Perrine, H. A. Sinclair, Arthur Williams, and C. J. H. Woodbury to the membership of the American Institute of Electrical Engineers, recto

Letter from Arthur E. Kennelly, L. A. Ferguson, Philip G. Gossler, F. A. C. Perrine, H. A. Sinclair, Arthur Williams, and C. J. H. Woodbury to the membership of the American Institute of Electrical Engineers, verso

Letter from William J. Hammer to John Uno Sebenius, [f. 1r]

Letter from William J. Hammer to John Uno Sebenius, [f. 1v]

Letter from William J. Hammer to John Uno Sebenius, [f. 2r]

Letter from William J. Hammer to John Uno Sebenius, [f. 2v]

Letter from William J. Hammer to John Uno Sebenius, f. 3r

Letter from William J. Hammer to John Uno Sebenius, f. 3v

Letter from John Uno Sebenius to William J. Hammer, [f. 1r]

Letter from John Uno Sebenius to William J. Hammer, [f. 1v]

Letter from John Uno Sebenius to William J. Hammer, f. 2r

Letter from John Uno Sebenius to William J. Hammer, f. 2v

Letter from John Uno Sebenius to William J. Hammer, f. 3r

Letter from John Uno Sebenius to William J. Hammer, f. 3v

Letter from John Uno Sebenius to William J. Hammer, f. 4r

Letter from John Uno Sebenius to William J. Hammer, f. 4v

Letter from Alfred Rigling to William J. Hammer, recto

Letter from Alfred Rigling to William J. Hammer, verso

Letter from A. Riesenberger to William J. Hammer, recto

Letter from A. Riesenberger to William J. Hammer, verso

Written note concerning selenium, recto

Written note concerning selenium, verso

Letter from H. Hasbrouck Haynes to William J. Hammer, recto

Letter from H. Hasbrouck Haynes to William J. Hammer, verso

Letter from Alfred A. Sommerville to William J. Hammer, recto

Letter from Alfred A. Sommerville to William J. Hammer, verso

Letter from William J. Hammer to Alfred A. Sommerville, [f. 1r]

Letter from William J. Hammer to Alfred A. Sommerville, [f. 1v]

Letter from William J. Hammer to Alfred A. Sommerville, f. 2r

Letter from William J. Hammer to Alfred A. Sommerville, f. 2v

Letter from Fred R. Keller to William J. Hammer, recto

Letter from Fred R. Keller to William J. Hammer, verso

Letter from Fred R. Keller to William J. Hammer, recto

Letter from Fred R. Keller to William J. Hammer, verso

Letter from William J. Hammer to Fred R. Keller, recto

Letter from William J. Hammer to Fred R. Keller, verso

Letter from Fred R. Keller to William J. Hammer, recto

Letter from Fred R. Keller to William J. Hammer, verso

Letter from L. A. Edwards to James L. Hays, recto

Letter from L. A. Edwards to James L. Hays, verso

Letter from James L. Hays to William J. Hammer, recto

Letter from James L. Hays to William J. Hammer, verso

Letter from Wilder D. Bancroft to William J. Hammer, recto

Letter from Wilder D. Bancroft to William J. Hammer, verso

Invitation addressed to William J. Hammer, recto

Invitation addressed to William J. Hammer, verso

Letter from William S. Andrews to William J. Hammer, recto

Letter from William S. Andrews to William J. Hammer, verso

Letter from Emil H. Grubbé to William J. Hammer, recto

Letter from Emil H. Grubbé to William J. Hammer, verso

Letter from the editor (unidentified name) to William J. Hammer, recto

Letter from the editor (unidentified name) to William J. Hammer, verso

Letter from William J. Hammer to the editors of "Electricity", recto

Letter from William J. Hammer to the editors of "Electricity", verso

Letter from Herbert Putnam to William J. Hammer, recto

Letter from Herbert Putnam to William J. Hammer, verso

Letter from Henry Schroeder to William J. Hammer, recto

Letter from Henry Schroeder to William J. Hammer, verso

A Nocturnal Fairyland, newspaper clipping, p. 4

Newspaper clipping, p. 3

Newspaper clipping, verso

Newspaper clipping, recto

Letter from Samuel Wein to William J. Hammer, recto

Letter from Samuel Wein to William J. Hammer, verso

Letter from Samuel Wein to William J. Hammer, [f. 1r]

Reprinted May, 1932 issue of Radio News Magazine, [f. 1v]

Reprinted May, 1932 issue of Radio News Magazine, [f. 2r]

Reprinted May, 1932 issue of Radio News Magazine, [f. 2v]

Letter from F. M. Savage to William J. Hammer, recto

Letter from F. M. Savage to William J. Hammer, verso

Steel Works Club pamphlet, recto

Steel Works Club pamphlet, verso

Letter from Alex C. Humphreys to William J. Hammer, recto

Letter from Alex C. Humphreys to William J. Hammer, verso

Letter from George L. Shepley to William J. Hammer, [f. 1r]

Letter from George L. Shepley to William J. Hammer, [f. 1v]

Letter from George L. Shepley to William J. Hammer, [f. 2r]

Letter from George L. Shepley to William J. Hammer, [f. 2v]

Letters to the editor, newspaper clipping, recto

Letters to the editor, newspaper clipping, verso