Figure 140. Music room, third floor, Building looking west, 1917.
Figure 149.
Figure 148. Edward Cary, NPS guide and former Edison employee, souvenir stand inside
gatehouse, April 22, 1969. Ground plan dynamo room, Building 1889.
XV
. Phonograph speaker experimental room, third floor.Figure 138. Dynamo room, Building date unknown.
Figure 143. Phonograph testing room, third floor, Building northwest corner, 1911-1912. Gatehouse, January 1917. Bill Lyman, Photographic service department, third floor, Building looking south,
January 1917.
Figure 150.
Figure 145.
Figure 147. Fred Ott’s room, third floor, Building southwest comer, April 1914. Gatehouse, 1890-1892.1890. Gatehouse, 1902-1903. Charles Dally, third floor, Building looking southwest, February 1913.
Figure 151.
Figure 141.
Figure 139.
Figure 142. Building southeast comer,
September 23, 1911.
Figure 146. Dynamo room, Building ca.
Figure 144. Third floor, Building north side, looking east, 1914
