The passage of strict federal labor laws We can give employment to from 50 to 100 girls, at the usual
wages paid in this place. Our custom is to pay to new hands one
dollar per week, & board in the Weaving & Dressing Rooms, &
one dollar & a half & board, in the Carding & Spinning Rooms,
until they can tend the Machines without assistance. After that
they are paid for all the work they can get off
-- John Clark, July 27, 1847
.
The economic growth demonstrated by this recruitment letter was primarily a result
of -

the abolition of the slave trade

the new production methods of industrialization

the expansion of the cottage industry system