Soap bubble for its soaps in 1886 using a painting by John Everett Millais of a child playing with bubbles. The Chicago company Chemtoy began selling bubble solution in the 1940s, and bubble solution has been popular with children ever since. According to one industry estimate, retailers sell around 200 million bottles annually. A bubble is made of transparent water enclosing transparent air. However the soap film is as thin as the visible light wavelength, resulting in interferences. This creates iridescence which, together with the bubble's spherical shape and fragility, contributes to its magical effect on children and adults alike. Each colour
Pears' Cyclopaedia Pears' Cyclopaedia Pears' Cyclopaedia is a one-volume encyclopaedia published in the United Kingdom. Pears' Soap launched the original "Pears' Shilling Cyclopaedia" in December 1897, the year of Queen Victoria's Diamond Jubilee. The first edition contained an English dictionary, a medical dictionary, a gazetteer and atlas, desk information and a compendium of general knowledge entitled "A Mass of Curious and Useful Information and Things that everyone ought to know in Commerce, History, Science, Religion, Literature and the other Topics of Ordinary Conversation". Each edition traditionally featured an atlas, a gazetteer, a chronological list of events, a list of prominent people (past