After cylinders peaked in popularity in 1905, flat discs and players began to dominate the market, and by 1912, cylinders were a thing of the past. Flat discs differed not only in physical shape, but also because the stylus (or needle) now moved up and down in the groove of the record, rather than from side to side or crossways. These records came in two sizes, either 10-inch, or 12-inch, and would run for approximately 5 minutes per side at roughly 78 revolutions per minute (rpm), hence the name. The finished 10" disc weighed ten ounces (rather heavy for a record, compared to today's standards) and was 1/4" thick. A diamond point, or a steel needle was used for the stylus. The records ranged in price anywhere from $1.35 to $2.25 each. Keep in mind, that there were only two songs on the entire record, and if you were lucky, roughly 10 minutes of playing time. Click here for the source.