Read it through once

If the boat was known to make her best speed when drawing five and a half feet forward and five feet aft, she was carefully loaded to that exact figure--she wouldn't enter a dose of homoeopathic pills on her manifest after that. Hardly any passengers were taken, because they not only add weight but they never will 'trim boat.' They always run to the side when there is anything to see, whereas a conscientious and experienced steamboatman would stick to the center of the boat and part his hair in the middle with a spirit level.