Question: What were squash racquets made of before?
About the article "Squash (sport)", section "History".

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Squash's use of stringed racquets is shared with tennis, which dates from the late sixteenth century, though is more directly descended from the game of racquets from England.
In "racquets", instead of hitting over a net as in tennis, players hit a squeezable ball against walls.
Squash was invented in Harrow School out of the older game racquets around 1830 before the game spread to other schools, eventually becoming an international sport.
The first courts built at this school were rather dangerous because they were near water pipes, buttresses, chimneys, and ledges.
The school soon built four outside courts.
Natural rubber was the material of choice for the ball.
Students modified their racquets to have a smaller reach to play in these cramped conditions.
The racquets have changed in much the same way as those used in tennis.
Squash racquets used to be made out of laminated timber.
In the 1980s, construction shifted to lighter, carbon-based materials (such as graphite) with small additions of such components as Kevlar, boron and titanium.
Natural "gut" strings were replaced with synthetic strings.
In the 19th century the game increased in popularity with various schools, clubs and even private citizens building squash courts, but with no set dimensions.
The first squash court in North America appeared at St. Paul's School in New Hampshire in 1884.
In 1904 in Philadelphia, Pennsylvania, the earliest national association of squash in the world was formed as the United States Squash Racquets Association, (USSRA), now known as U.S.
Squash.
In April 1907 the Tennis, Racquets & Fives Association set up a sub committee to set standards for squash.
Then the sport soon formed, combining the three sports together called “Squash”.
In 1912 the Titanic had a squash court in first class.
It was not until 1923 that the Royal Automobile Club hosted a meeting to further discuss the rules and regulations and another five years elapsed before the Squash Racquets Association was formed to set standards for squash in Great Britain.
The sport spread to America and Canada, and eventually around the globe.
It was founded in 1924 in New York as Metropolitan Racquets Association, or MSRA.
Squash Racquets Association Of Malaysia (SRAM) is the National Organisation for Squash in Malaysia.
The company was founded in 1972 at the Royal Lake Club. 
The Malaysia national women's squash team represents Malaysia in international squash team competitions, and is governed by Squash Racquets Association Of Malaysia.
Since 1990, Malaysia has participated in four Semi finals of the World Squash Team Open. 
The Malaysia national men's squash team represents Malaysia in international squash team competitions, and is governed by Squash Racquets Association Of Malaysia.
Since 1967, Malaysia has participated in six quarter finals of the World Squash Team Open. 
Badminton rackets are lightweight, with top quality racquets weighing between 70 and 95 grams (2.4 to 3.3 ounces) not including grip or strings.
They are composed of many different materials ranging from carbon fibre composite (graphite reinforced plastic) to solid steel, which may be augmented by a variety of materials.
Carbon fibre has an excellent strength to weight ratio, is stiff, and gives excellent kinetic energy transfer.
Before the adoption of carbon fibre composite, racquets were made of light metals such as aluminium.
Earlier still, racquets were made of wood.
Cheap racquets are still often made of metals such as steel, but wooden racquets are no longer manufactured for the ordinary market, because of their excessive mass and cost.
Nowadays, nanomaterials such as fullerene and carbon nanotubes are added to rackets giving them greater durability.
There is a wide variety of racquet designs, although the laws limit the racquet size and shape.
Different racquets have playing characteristics that appeal to different players.
The traditional oval head shape is still available, but an isometric head shape is increasingly common in new racquets.