Squills (Powdered), wheat flour.
Sugar (Moist), sand, flour, &c.
Sulphur, sulphurous acid (as an impurity).
Sulphuric Acid, lead, water, arsenic, hydrochloric acid, &c.
Tapioca, mixing inferior starches with the pure tapioca.
Tea, sand, iron filings, exhausted tea leaves, foreign leaves; and in green teas, black lead, Prussian blue, China clay.
Tobacco, inferior tobacco, water.
Turmeric, yellow ochre, carbonate of soda, or potash.
Uva Ursi (Bearberry Leaves), leaves of red whortleberry, and others.
Vinegar, sulphuric acid, and metallic impurities.