Morton Salt's hand-drawn logo features the "Morton Salt Girl," a young girl walking in the rain with an opened umbrella and scattering salt behind her from a cylindrical container of table salt, and is one of the ten best-known symbols in the United States. [11] The company's logo (from 1914) and its motto, "When it rains it pours" (from 1911), were developed to illustrate the point that Morton Salt was free flowing even in rainy weather after the company began adding magnesium carbonate as an absorbing agent to its table salt in 1911 to ensure that it poured freely; calcium silicate is now used instead for the same purpose. [2] The Morton Salt Girl, also known as the Umbrella Girl, has gone through seven different iterations, including the latest update in 2014 for its "hundredth birthday",