Photographs of Edison and Menlo Park

Photograph of group of men posing outside a building, recto

Photograph of group of men posing outside a building, verso

Copy of newspaper clipping, recto

Copy of newspaper clipping, verso

Copy of newspaper clipping, recto

Copy of newspaper clipping, verso

Photograph of small wooden building, recto

Photograph of small wooden building, verso

Envelope with annotation, recto

Envelope with annotation, verso

Photograph of executive staff of the first Edison incandescent electric lamp factory at Menlo Park, recto

Photograph of executive staff of the first Edison incandescent electric lamp factory at Menlo Park, verso

Photograph of executive staff of the first Edison incandescent electric lamp factory at Menlo Park, recto

Photograph of executive staff of the first Edison incandescent electric lamp factory at Menlo Park, verso

Photograph of Thomas A. Edison (far left) with group of men, recto

Photograph of Thomas A. Edison (far left) with group of men, verso

Economy test at the Harrisburg Electric Light Co.'s Central Station, Harrisburg, PA., clipping, recto

Economy test at the Harrisburg Electric Light Co.'s Central Station, Harrisburg, PA., clipping, verso

Economy test at the Harrisburg Electric Light Co.'s Central Station, Harrisburg, PA., clipping, recto

Economy test at the Harrisburg Electric Light Co.'s Central Station, Harrisburg, PA., clipping, verso

Economy test at the Harrisburg Electric Light Co.'s Central Station, Harrisburg, PA., clipping, recto

Economy test at the Harrisburg Electric Light Co.'s Central Station, Harrisburg, PA., clipping, verso

Economy test at the Harrisburg Electric Light Co.'s Central Station, Harrisburg, PA., clipping, recto

Economy test at the Harrisburg Electric Light Co.'s Central Station, Harrisburg, PA., clipping, verso

Photograph of an incandescent electric lamp attacher and detacher, recto

Photograph of an incandescent electric lamp attacher and detacher, verso

Photograph of light bulb, recto

Photograph of light bulb, verso

Photograph of Thomas A. Edison's home in Menlo Park, recto

Photograph of Thomas A. Edison's home in Menlo Park, verso

Photograph of men outside of Thomas A. Edison’s Menlo Park invention factory, recto

Photograph of men outside of Thomas A. Edison’s Menlo Park invention factory, verso

Photograph of the birthplace of Thomas A. Edison, recto

Photograph of the birthplace of Thomas A. Edison, verso

Photograph of partially demolished room with remaining books and papers, recto

Photograph of partially demolished room with remaining books and papers, verso

Photograph of office space with many books, pictures, and contraptions, recto

Photograph of office space with many books, pictures, and contraptions, verso

Photograph of desks filled with books, recto

Photograph of desks filled with books, verso

Photograph of room with trunks inside, recto

Photograph of room with trunks inside, verso

Photograph of stack of crates and books, recto

Photograph of stack of crates and books, verso

Photograph of desks filled with books, recto

Photograph of desks filled with books, verso

Photograph of room with trunks inside, recto

Photograph of room with trunks inside, verso

Photograph of stack of crates and books, recto

Photograph of stack of crates and books, verso

Photograph of partially demolished room with remaining books and papers, recto

Photograph of partially demolished room with remaining books and papers, verso

Interior view of Edison's "Historic Menlo Park N. J., Laboratory", clipping, recto

Interior view of Edison's "Historic Menlo Park N. J., Laboratory", clipping, verso

Photograph of interior section of Thomas A. Edison's Menlo Park laboratory, recto

Photograph of interior section of Thomas A. Edison's Menlo Park laboratory, verso

Photograph of interior view of Thomas A. Edison's Menlo Park laboratory, recto

Photograph of interior view of Thomas A. Edison's Menlo Park laboratory, verso

Photograph of joint meeting of American and English electrical engineers at the U. S. Pavilion, recto

Photograph of joint meeting of American and English electrical engineers at the U. S. Pavilion, verso

Photograph of joint meeting of American and English electrical engineers at the U. S. Pavilion, recto

Photograph of joint meeting of American and English electrical engineers at the U. S. Pavilion, verso

Copy of newspaper clipping, recto

Copy of newspaper clipping, verso

Copy of newspaper clipping, recto

Copy of newspaper clipping, verso

Photograph of William J. Hammer, William Mungle, and Francis Jehl standing at the demolished Menlo Park site, recto

Photograph of William J. Hammer, William Mungle, and Francis Jehl standing at the demolished Menlo Park site, verso

Photograph of William J. Hammer, William Mungle, and Francis Jehl standing at the demolished Menlo Park site, recto

Photograph of William J. Hammer, William Mungle, and Francis Jehl standing at the demolished Menlo Park site, verso

Photograph of William J. Hammer, William Mungle, Francis Jehl, and unidentified man standing at the demolished Menlo Park site, recto

Photograph of William J. Hammer, William Mungle, Francis Jehl, and unidentified man standing at the demolished Menlo Park site, verso

Photograph of William J. Hammer, William Mungle, and Francis Jehl standing at the demolished Menlo Park site, recto

Photograph of William J. Hammer, William Mungle, and Francis Jehl standing at the demolished Menlo Park site, verso

Photograph of the Menlo Park site in 1880, recto

Photograph of the Menlo Park site in 1880, verso