Paris: Domino Press, 1931. Hard Cover. First Edition. Colorful French take on the story of Daniel Boone in vibrant colors in the Art Modern tradition of the period. Text in French. Paper covered boards with illustration of Daniel Boone Camping. Soiling to cover boards, wear and rubbing at edges, spine cloth missing, but entire binding intact. Previous owner's name in ink on first free endpaper, clean and vibrant within. Photographs gladly provided. Good. More about Daniel Boone: Les Aventures d'un Chasseur Americain Parmi les Peaux Rouges

Paris: Gauthier-Villars, 1890. Wraps. First Edition. 1172 pp. 4to. Wear and cuffing to original light salmon colored wraps. Original paper label pasted to spine with Volume # and year handwritten in black ink. Clean within, most pages uncut. Text in French. Housed in custom protective chemise with gold embossed titling to spine.
Edouard Branly (1844-1940) demonstrates the first sensitive device for detecting radio waves, later named the "coherer." Very Good. More about BRANLY'S COHERER: "Variations de conductibilities sous diverses influences electriques"...

Paris: Gauthier-Villars, 1903. Hardcover. First Edition. 1782 pp. 4to. Paper covered boards with brown leather spine with gold embossed tilting, minor chipping to head and foot of spine. Very clean within. Text in French.
In 1903, Pierre Curie and his laboratory assistant Albert Laborde determined that radioactivity releases immense amounts of heat -- 100 calories per gram per hour. Very Good. More about RADIOACTIVITY & HEAT: "Sur la chaleur dégagée spontanément par les sels de radium.”...

Paris: Gauthier-Villars, 1869. Wraps. First Edition. 1635 pp. 4to. Wear and cuffing to original light salmon colored wraps. Original paper label pasted to spine with Volume # and year handwritten in black ink. Clean within, most pages uncut. Text in French.
Important paper in which Jules Janssen describes his observation of the spectral line in the sun that was later determined to be a new element (helium), the only element initially discovered outside the earth. Norman Lockyer observed the same spectral line several months later and even later determined that it represented a new element. Lockyer and Janssen are both credited with the discovery. Very Good. More about DISCOVERY OF HELIUM: "Observations spectrales prises pendant l' éclipse du 18 août 1868,...