Harold Donaldson Eberlein, The Architecture of Colonial America
“ In the fore part of the eighteenth century, double or single hung sash windows became the fashion and were very generally substituted for the older casements by alterations made in the manner alluded to in Chapter III, although, quite frequently, particularly in the Middle and Southern Colonies, no change in the shape or dimensions of the window openings was considered desirable or necessary. The lights for the sashes were universally small and it was not until the end of the eighteenth century that they increased appreciably in size. ”
