Jack Barnes (toxinologist)  John Handyside (Jack) Barnes (1922–1985) was a physician and toxinologist in Queensland, Australia. Born in Charleville he is known for his research on the box jellyfish. Amongst other things, he established that their toxin would not discharge on a synthetic surface and so wore pantyhose when collecting specimens, a practice now adopted by lifesavers at risk of jellyfish stings.