Temps de résolution pour ce puzzlePartagez vos temps de résolution avec vos amis
The first "friction match" was invented by English chemist John Walker in 1827. Early work had been done by Robert Boyle in the 1680s with phosphorus and sulfur, but his efforts had not produced useful results. Walker discovered a mixture of antimony sulfide, potassium chlorate, gum, and starch could be ignited by striking against any rough surface.
Partager ce casse-tête
Sam Clown Fish RightVen Hot Sauce BottleJeu Wirehaired GriffonMer Dragon FaucetMar Flower OsteospermumLun Rope Cleat HitchDim Brick Sea WindowAutres puzzles précédents