of "Edison Hi-Speed Extra Loud Moulded Records", running at the speed of 160 RPM instead of the usual (ca. 1898–1902) speed of 144 RPM or (ca. 1889–1897) 120 RPM. Until ca. 1898, Edison's speed was 125 RPM. In 1908, Edison introduced a new line of cylinders (called Amberol) playing 4 rather than 2 minutes of music on the same sized record, achieved by shrinking the grooves and spacing them twice as close together. New machines were sold to play these records, as were attachments for modifying existing Edison phonographs. In November 1912, the new Blue Amberol Records, made out of a type of smooth, hard plastic similar to celluloid invented by Edison labs, were introduced for public sale. The first release was number 1501, a performance of the Rossini's overture to his opera Semiramide, performed by the American Standard Orchestra. The plastic Blue Amberol records were much more durable than wax cylinders. The Edison lab claimed a 3000+ playback quota for the Blue Amberol. In that same year, the Edison Disc Record came out. In 1910, artists' names began to be added to the records; previously, Edison's policy was to promote his cylinders (and up until 1915, discs) based on the recognition of composers and the works recorded thereon in lieu of the performers themselves. Thomas A. Edison, Inc., successor to the National Phonograph Company, continued selling cylinders until they went out of the record business in November 1929. However, from January 1915 onwards these were simply dubs of their commercial disc records intended for customers who still used cylinder phonographs purchased years before. The book, "Edison Cylinder Records, 1889-1912," by Allen Koenigsberg, APM Press, lists and dates all American Edison wax cylinders (2-4 min.); . Materials and process used to manufacture cylinder records Cylinders that are mentioned from 1888 are sometimes called "yellow paraffin" cylinders, but these cylinders are not paraffin, which is a soft oily wax and would not hold up over many plays. They could be a number of formulas tested by Jonas Aylsworth, Thomas Edison's chemist. Most of the surviving 1888 recordings would be formulated from a combination of ceresin wax, carnauba wax, stearic acid, and beeswax. A record of this kind has a cigar-like smell and is physically very soft when first molded. In a year's time, the record would harden quite considerably. To play these first cylinders, the model B reproducer must be used.