Summarize the main points of this source.

Miss Sarah G. Bagely said she had worked in the Lowell Mills eight years and a half, six years and a half on the Hamilton Corporation, and two years on the Middlesex. She is a weaver, and works by the piece. She worked in the mills three years before her health began to fail … The chief evil, so far as health is concerned, is the shortness of time allowed for meals. The next evil is the length of time employed—not giving them time to cultivate their minds ...

The main points of this source are that Miss Sarah G. Bagely worked in the Lowell Mills for a total of eight and a half years, primarily as a weaver working by the piece. She experienced health issues after three years of working there, which she attributes to the shortness of time allowed for meals and the lack of time for personal development due to long work hours.