Because it was invented by a man named Jack Bowlington from Jacksontown, in Jacksonville CA.
The above answer is wrong & the person who answered is trying to be a 'comedian' & failing.
There are a couple of theories why the 'Jack' is so called.
1.It comes from the Latin 'jactus' meaning 'to throw or cast'.
2.'jack' in some context means 'smaller version' as in 'Jack-rabbit' IE the smaller version of a rabbit.
'The 'jack bowl' was mentioned in an article by R Pierce in 1697 where he stated..' He cdid not have the strength to throw the Jack-Bowl the length of the green'. Over time the 'Jack-Bowl' was shortened to plain 'Jack'.
There are other theories but these two seem to make the most sense.
In lawn bowls, the distance of 23 meters is measured from the mat's front edge where the bowler delivers the bowl to the jack. This means it is 23 meters from the mat to the jack, not from either end of the center line. The center line serves as a guideline for the placement of the mat but does not change the measurement to the jack.
yes, it is the white small ball. Without it, you couldnt play.
The jack used in lawn bowls is typically a small, spherical ball that measures between 3.5 to 4.5 inches (approximately 9 to 11 cm) in diameter. It weighs around 14 ounces (about 400 grams). The jack is usually colored white or yellow, making it easily visible on the green.
take a jack and jack it up
The only time, that i can think of, when you spray a bowl in a game of lawn bowls, is when the wood (black bowl) has touched the Jack (white ball) They spray the black bowl, with a white spray chalk, so that you can see that it hit the Jack. If a bowl has been sprayed with the spray chalk, it means that it is a LIVE BOWL and, even if it is hit out of the rink, it still counts.
White or it is sometimes yellow in big competitions.
Lawn Bowling
Skipper of lawn bowls
floor or bumper jack
Lawn Bowling or "Bowls" in England.
Similar to bocce ball in the UK is the game of lawn bowls. In lawn bowls, players roll biased balls towards a smaller target ball known as the "jack," aiming to get their balls as close as possible to it. Another similar game is pétanque, which is played with metal balls and involves throwing them towards a wooden ball called the "cochonnet." Both games emphasize skill, precision, and strategy, much like bocce ball.
jack