Summarize the main points of this source.

Now let us examine the nature of the labor itself, and the conditions under which it is performed. Enter with us into the large rooms, when the looms are at work. The largest that we saw is in the Amoskeag Mills at Manchester. It is four hundred feet long, and about seventy broad; there are five hundred looms, and twenty-one thousand spindles in it. The din and clatter of these five hundred looms under full operation, struck us on first entering as something frightful and infernal, for it seemed such an atrocious violation of one of the faculties of the human soul, the sense of hearing. After a while we became somewhat inured to it, and by speaking quite close to the ear of an operative and quite loud, we could hold a conversation, and make the inquiries we wished.

The girls attend, upon average, three looms; many attend four, but this requires a very active person, and the most unremitting care. However, a great many do it. Attention to two is as much as should be demanded of an operative. This gives us some idea of the application required during the thirteen hours of daily laborer. The atmosphere of such a room cannot of course be pure; on the contrary it is charged with cotton filaments and dust, which, we were told, are very injurious to the lungs. On entering the room, although the day was warm, we remarked that the windows were down; we asked the reason, and a young woman answered very naively, and without seeming to be in the least aware that this privation of fresh air was anything else than perfectly natural, that "when the wind blew, the threads did not work so well." After we had been in the room for fifteen or twenty minutes, we found ourselves, as did the persons who accompanied us, in quite a perspiration, produced by a certain moisture which we observed in the air, as well as by the heat.

- Large rooms in textile mills like the Amoskeag Mills at Manchester contain hundreds of looms and spindles, creating a deafening noise.

- Operatives, mostly young girls, work long hours attending multiple looms, with some even managing four at a time.
- The atmosphere in these rooms is unhealthy, filled with cotton filaments and dust that are harmful to the lungs.
- Windows are often kept closed to maintain the smooth working of the threads, leading to poor ventilation and heat buildup in the rooms.
- The strenuous conditions and lack of fresh air make it difficult for workers to stay comfortable and healthy during their long shifts.