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[NATIONAL ELECTRIC LAMP ASSOCIATION -- PHOTO ALBUM].Biblio.com

Camp Nela. 1914. Sterling Division National Lamp Works -- remarkable and scarce Edwardian souvenir photo album for the vacation management retreat hosted by General Electric for Sterling held at the newly opened Camp Nela in East Cleveland filled with 19 large silver gelatin images of exhibits and activities.

1914ref. 53706Cleveland & Warren OH: Sterling Division National Lamp Works General Electric Corporation 1914. Oblong folio. 14.25 x 11.25 in. 19 leaves unnumbered. composed of thick gray paper stock. With 19 tipped-in original silver gelatin photographs sized 7.5 x 9.5 in. Original gray softcovers punch sewn at gutter margin w/ gray silk braid yapp edges silver & black lettering on front cover minor edgewear rubbing some soiling to fore-edge front cover still VG- exemplar. First edition of this lavishly produced souvenir album filled with original photographs of the engineering and lighting exhibition retreat held by Sterling at General Electric’s Camp Nela one of the first industrial research parks in the nation. A small plateau above a picturesque ravine this rustic setting would eventually contain a large lamp laboratory and a 72 foot bell tower. The large photos in this souvenir album portray the engineering conferences families playing in the pool lavishly appointed dining hall and the other camp assets. Of special interest are the many lighting displays and product displays prepared by this division of GE for the retreat showing many styles of lighting sconces types of Mazda light bulbs the Arts & Crafts furniture at the time product displays advertising and the available fittings from the Company.The National Electric Lamp Association was founded at the end of the 19th century during a great deal of turmoil in the incandescent lamp industry and a number of small lamp manufacturers needed to pool their resources in order to compete with General Electric. Ironically Franklin Terry Burton & Henry Tremaine John & Robert Crouse founded the Company in 1901 with 75% of the needed capital from GE who was to remain a silent partner. Sterling Electric was one of the original founders of the organization and in 1911 when the U.S. Government brought an anti-trust suit against the N.E.L.A. GE exercised their option to buy the remaining 25% and they officially all divisions became part of General Electric forming the National Quality Lamp Division. See: Association Island’s History 2015; Nela Park: A brief early history -- Terry Management Style and Incandescent Lamp Advances. Sterling Division, National Lamp Works, General Electric Corporation], paperback

Zephyr Used & Rare Books · Estados Unidos500,00 US$≈ 446,71 €

RITTER, (JOHANN W). - THE DISCOVERY OF "CHEMICAL RAYS" - ULTRAVIOLET LIGHT AND RADIATIONBiblio.com

Announcing his discovery of ultraviolet light "Von den Herren Ritter und Bückmann. - - Am 22sten Febr. habe ich auch auf der Seite des Violetts im Farbespectrum ausserhalb desselben Sonnenstrahlen angetroffen.

1801ref. 43492Halle Rengerschen Buchhandlung 1801. Without wrappers as published in "Annalen der Physik. Herausgegeben von Ludwig Wilhelm Gilbert" Bd. 7 Viertes Stück. The entire issue offered =Heft 4. Pp. 387-528. Ritter's announcement p. 525. With titlepage to volume 7. Clean and fine. Titlepage a bit shavedin inner margin. First printing of Ritter's announcement of his discovery of ultraviolet light in a halfpage letter addressed to Gilbert's Annalen. With that discovery it became clear that visible light represents no more than a fraction of a continous spectrum.A year earlier in 1800 William Herschel discovered infrared light. This was the first time that a form of light beyond visible light had been detected. After hearing about Herschel's discovery of an invisible form of light beyond the red portion of the spectrum Ritter decided to conduct experiments to determine if invisible light existed beyond the violet end of the spectrum as well. He had heard that blue light caused a greater reaction in silver chloride than red light did. Ritter decided to measure the rate at which silver chloride reacted to the different colors of light. He directed sunlight through a glass prism to create a spectrum. He then placed silver chloride in each color of the spectrum and found that it showed little change in the red part of the spectrum but darkened toward the violet end of the spectrum. Johann Ritter then decided to place silver chloride in the area just beyond the violet end of the spectrum in a region where no sunlight was visible. To his amazement this region showed the most intense reaction of all. This showed for the first time that an invisible form of light existed beyond the violet end of the visible spectrum. This new type of light which Ritter called Chemical Rays later became known as ultraviolet light or ultraviolet radiation the word ultra means beyond. - Parkinson Breakthroughs: 1801 P. unknown

Herman H. J. Lynge & Søn A/S · Dinamarca3500,00 DKK≈ 468,24 €

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