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| A Soil Science student waits as a limestone gravel boils in hydrochloric acid solution. |
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| Soil Science student, Emma Weiss, sophomore, rinses a beaker and pours the remaining water down the drain. |
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| Soil Science Teacher's Assistant, Mary Weissenberg, explains how to use a mesh filter to students. |
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| Two Soil Science students help each other pour out a hydrochloric acid solution into a filter and test tube. |
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