Figure 150. Phonograph testing room, third floor, Building northwest corner, 1911-1912. Dynamo room, Building ca.
XV
. Third floor, Building north side, looking east, 1914.
Figure 144. Phonograph speaker experimental room, third floor. Gatehouse, 1890-1892.
Figure 142. Charles Dally, third floor, Building looking southwest, February 1913. Building southeast comer,
September 23, 1911.
Figure 143.
Figure 145.
Figure 139.
Figure 140. Ground plan dynamo room, Building 1889.
Figure 146.
Figure 141. Edward Cary, NPS guide and former Edison employee, souvenir stand inside
gatehouse, April 22, 1969. Fred Ott’s room, third floor, Building southwest comer, April 1914. Music room, third floor, Building looking west, 1917.
Figure 151.Figure 138. Gatehouse, January 1917.1890. Dynamo room, Building date unknown.
Figure 147. Bill Lyman, Photographic service department, third floor, Building looking south,
January 1917. Gatehouse, 1902-1903.
Figure 149.
Figure 148
