Verso of card reads: "(Pouring on Sand from Scoop) In this picture the girl has taken sand from the container and is pouring it onto the bomb with a long-handled scoop. Sand does not extinguish the magnesium bomb, but it controls and reduces the heat, thus allowing near approach. Note the Redhill container . . . placed on its side in such a way that full scoopfuls of sand can easily be withdrawn."