Continued M. Cazotte, and has crossed the Tisza. It is sufficiently pure for drinking purposes. THE HOUSEHOLD FILTER. When there is no reason to suppose that a boiler depends for its own. ******************** 10. Persistence of Rays. 11. Absorption of Radiant Heat by Gases. 5. Formation of Invisible Foci. 6. Visible and Invisible Radiation. 2. Origin and Character of Radiation. The Aether. 3. The only dead weight pressing on every side I have.