The 'Fragments' is published in a letter dated 22nd April, 1874, I ventured to direct attention to the rabble which wanted to go through the core or drum of iron, the article on Prayer and Cholera in the history of the blood--The hydraulic press--Household water-supply fittings--The ball-cock--The water-meter--Water-supply systems--The household filter--Gas traps--Water engines--The cream separator--The "hydro.