Figure 148.
Figure 139.
Figure 147. Phonograph speaker experimental room, third floor.
Figure 150.Figure 138. Phonograph testing room, third floor, Building northwest corner, 1911-1912. 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 1914.1890.
Figure 151. Bill Lyman, Photographic service department, third floor, Building looking south,
January 1917. Gatehouse, 1902-1903.
Figure 149. Gatehouse, January 1917. Gatehouse, 1890-1892. Third floor, Building north side, looking east, 1914.
Figure 142.
Figure 141.
Figure 143. Music room, third floor, Building looking west, 1917. Dynamo room, Building ca.
Figure 140.
Figure 145. Dynamo room, Building date unknown.
Figure 146.
Figure 144. Building southeast comer,
September 23, 1911.
XV
. Ground plan dynamo room, Building 1889. Charles Dally, third floor, Building looking southwest, February 1913
