Answer by taking a quote from the following article:

A phonograph record (also known as a gramophone record, especially in British English, or record) is an analog sound storage medium in the form of a flat disc with an inscribed, modulated spiral groove. The groove usually starts near the periphery and ends near the center of the disc. At first, the discs were commonly made from shellac; starting in the 1950s polyvinyl chloride became common. In recent decades, records have sometimes been called vinyl records, or simply vinyl, although this would exclude most records made until after World War II.

78 rpm records were normally sold individually in brown paper or cardboard sleeves that were plain, or sometimes printed to show the producer or the retailer's name. Generally the sleeves had a circular cut-out exposing the record label to view. Records could be laid on a shelf horizontally or stood on an edge, but because of their fragility, breakage was common.  German record company Odeon is often said to have pioneered the album in 1909 when it released the Nutcracker Suite by Tchaikovsky on 4 double-sided discs in a specially designed package. However, the previous year Deutsche Grammophon had produced an album for its complete recording of the opera Carmen. The practice of issuing albums was not adopted by other record companies for many years. One exception, HMV, produced an album with a pictorial cover for its 1917 recording of The Mikado (Gilbert & Sullivan).  By about 1910, bound collections of empty sleeves with a paperboard or leather cover, similar to a photograph album, were sold as record albums that customers could use to store their records (the term "record album" was printed on some covers). These albums came in both 10-inch and 12-inch sizes. The covers of these bound books were wider and taller than the records inside, allowing the record album to be placed on a shelf upright, like a book, suspending the fragile records above the shelf and protecting them.  In the 1930s, record companies began issuing collections of 78 rpm records by one performer or of one type of music in specially assembled albums, typically with artwork on the front cover and liner notes on the back or inside cover. Most albums included three or four records, with two sides each, making six or eight tunes per album. When the 12-inch vinyl LP era began in 1948, each disc could hold a similar number of tunes as a typical album of 78s, so they were still referred to as an "album", as they are today.

How many songs did they have?
Most albums included three or four records, with two sides each, making six or eight tunes per album.