[31] Tomas Nonnenmacher,“State Promotion and Regulation of the Telegraph Industry,”The Journal of Economic History,61,no.1 (2001): 20,24,29.
[32] Nonnenmacher,“State Promotion and Regulation of the Telegraph Industry,”28;Nonnenmacher,“History of the U.S.Telegraph Industry”;Thompson,Wiring a Continent,440–42.
[33] Silverman,Lightning Man,397,441.
