Photographic reproduction of an artist's rendering of the Welsbach Gas Light Company site located along the Delaware River in Gloucester City, New Jersey. From 1888 to 1940, the Welsbach Gas Light Company held…

Draft of a paper written by Max Albert Bredig (1902-1977) titled Über anomale Dispersion in Alkalihalogenidphosphorenpublished in Zeitschrift für Physik volume 46 (1927).

Gas mantles and electric bulbs competed for the home lighting market during the first decades of the 20th century. This advertisement claimed modern gas lighting offered health benefits by ridding the atmosphere of dust…

Volume detailing various industrial applications of rare earths and closely-related elements, including thorium, zirconium, tantalum, and tungsten. Particular attention is given to the illuminating effect of the oxides…

Figure 42 from the 1915 volume The Rare Earth Industry depicting stages in the manufacture of a metallic filament lamp. The volume details various industrial applications of rare earths and closely-related elements,…

Figure 27 from the 1915 volume, The Rare Earth Industry depicting the "flashing" room of the Edison and Swan Electric Light Company. The illustration depicts scientists preparing filaments for incandescent electric glow…

Figures 24 and 25 from the 1915 volume The Rare Earth Industry depicting the manufacture of a carbon lamp. The volume details various industrial applications of rare earths and closely-related elements, including…

Figure 23 from the 1915 volume The Rare Earth Industry depicting an automatic lighter for inverted burners. The volume details various industrial applications of rare earths and closely-related elements, including…

Figure 21 from the 1915 volume The Rare Earth Industry depicting a machine used to test the durability of gas mantles, a component of incandescent gas lanterns. The volume details various industrial applications of rare…

Figure 20 from the 1915 volume The Rare Earth Industry depicting a machine for trimming upright mantles, a component of incandescent gas lanterns. The volume details various industrial applications of rare earths and…

Figure 19 from the 1915 volume The Rare Earth Industry depicting a movable crate (1/52 actual size) for drying incandescent mantles, a component of incandescent gas lanterns. The volume details various industrial…

Figure 18 from the 1915 volume The Rare Earth Industry depicting a machine (1/16 actual size) for immersing mantles, a component of incandescent gas lanterns, in a collodion solution prior to transport. The volume…

Figure 17 from the 1915 volume The Rare Earth Industry depicting a machine (1/14 actual size) for burning off and hardening inverted mantles, a component of incandescent gas lanterns. The volume details various…

Figure 16 from the 1915 volume The Rare Earth Industry depicting a machine (1/5 actual size) for applying "fixing" solution to inverted mantles, a component of incandescent gas lanterns. The volume details various…

Figure 14 from the 1915 volume, The Rare Earth Industry depicting a machine (1/10 actual size) for saturating cotton and ramie webs with a solution of rare earth metals during the manufacture of gas mantles. The volume…

Figures 10 through 12 from the 1915 volume The Rare Earth Industry. Figures 10 and 11 are photomicrographs showing collodion fibers used in the manufacture of incandescent gas mantles before and after burning. The…

Digitized content includes a frontispiece portrait of Austrian chemist Carl Auer von Welsbach (1858-1929), a key figure in the history of rare earth elements. In 1885 Welsbach showed didymium was not an element, but an…

This 1901 advertisement for the British branch of the Welsbach Incandescent Gas Light Company features an owl swooping through the dark into the light of a gas mantle streetlight. The owl complains that the light makes…

Black and white illustration depicting an evening marsh scene. The illustration demonstrates the natural occurrence of phosphoric compounds which become luminous in the presence of atmospheric gases. The illustration…

Illustration depicting a flower temporarily illuminated through the use of phosphorescent powder.

Illustration depicting an experiment in which an artificial flower coated with phosphorescent powder temporarily becomes luminous and shines in the dark when exposed to magnesium wire.

This is a reprint of promotional booklet produced by the Welsbach Company about the history of its light. The booklet was reprinted in 1984 by the Rushlight Club, an association of collectors and students of historic…

The Welsbach company produced this pamphlet around 1889 to promote its system of gas lighting. The brochure includes a depiction of the factory in Gloucester, New Jersey, and several illustrations of lighting system…