Changed "break-down" to "breakdown" on page 367: "provision against breakdown."
Changed "way-station" to "waystation" twice on page 372: "with a waystation set;" and "a waystation on a block wire."
Changed "way stations" to "waystations" on page 375, in the entry for Long-distance switching.
Each page of the Index repeated this text: "Note.—For page numbers see foot of pages." They were removed.