For some perspective, in 1903 over 80,000 acres burned, with 30,000 burned in the Kilkenny/Berlin fire.
http://www.eeb.cornell.edu/goodale/2003Goodale Appalachiaver3.pdf
Eventually the logging died down and was better regulated though, so the burning of 350 acres (last estimate I heard for this fire) is large considering:
"During the last forty years [published in 2003 I believe], only 643 cumulative acres of the WMNF
have burned (Main & Haines 1974; T. Brady, USFS, pers. comm.
June 2003). This amounts to just 0.002 percent of the forest per year.
This reduction in fires is due largely to changes in forest harvest
practices and to advances in fire detection and suppression. Unlike in
the western U.S., where natural fires were common, fires in White
Mountain forests were rare. However, they did occur under the right
circumstances—when natural (hurricane) or human (heavy logging)
factors disturbed large patches of forest, and these patches coincided
with the right combination of weather and ignition sources.
Concerted efforts helped prevent similar combustion after the 1938
hurricane (Hale 1958), and future fires are possible should the right
combination of circumstances occur again. Furthermore, the unusual
burst of flames in the early 1900s was very important for the
formation of the national forest system and for determining many of
the characteristics of White Mountain forests today."
