RESIDENCE OF NINIAN W. EDWARDS, SPRINGFIELD, ILLINOIS. LINCOLN'S MARRIAGE LICENSE AND MARRIAGE CERTIFICATE. REV. CHARLES DRESSER. THE GLOBE HOTEL, SPRINGFIELD, ILLINOIS. A BROOK IN THE DEPARTMENT OF VAR, FRANCE. JEAN BAPTISTE CAMILLE COROT. A BY-PATH. EARLY MORNING. DIANA'S BATH. A SHALLOW RIVER. THE EDGE OF THE FOREST (FONTAINEBLEAU). ON THE RIVER OISE. THE STORMY SEA. A SUNLIT GLADE. A SHEPHERD AND HIS FLOCK. "THE MAN WITH THE LEATHERN BELT." THE STONE-BREAKERS. THE GOOD SAMARITAN. SERVANT AT THE FOUNTAIN. AN UNHAPPY FAMILY. [Illustration: PICTURES TAKEN BY PROFESSOR ARTHUR W. WRIGHT OF YALE COLLEGE, SHOWING THE DIFFERENCES BETWEEN SUBSTANCES IN PENETRABILITY TO THE RÖNTGEN RAYS. 1 and 3. Flint glass prism (very opaque). 2. Quartz prism, showing transmission of the rays through the thin edges. 4. Prism of heavy glass, more opaque than flint glass. 5. One-cent coin, copper. 6. Five-cent coin, nickel. 7. White-crown glass, 1½ millimetres thick. 8. Blue crown glass, 2 millimetres thick. 9. Yellow crown glass, 1½ millimetres thick. 10. Crown glass, 1 millimetre thick, covered with a very thin layer of gold. 11. Red crown glass, 2 millimetres thick. 12. Block of Iceland spar (very transparent to ordinary light, but very opaque to Röntgen rays). 13. A bit of tinfoil. 14. Aluminium medal, showing faint traces of the design and lettering on both sides, as if it were translucent. 15. Metallic mirror, shows no effect of regular reflection. 16. Bit of sheet-lead, 1 millimetre thick. 17. Quarter-of-a-dollar coin, silver. 18. Piece of thin ebonite, such as is used for photographic plate-holder.] [Illustration: DR. WILLIAM KONRAD RÖNTGEN, DISCOVERER OF THE X RAYS. From a photograph by Hanfstaenge, Frankfort-on-the-Main.] THE NEW MARVEL IN PHOTOGRAPHY. A VISIT TO PROFESSOR RÖNTGEN AT HIS LABORATORY IN WÜRZBURG.--HIS OWN ACCOUNT OF HIS GREAT DISCOVERY.--INTERESTING EXPERIMENTS WITH THE CATHODE RAYS.--PRACTICAL USES OF THE NEW PHOTOGRAPHY. BY H.J.W. DAM.