Yarn, blue, 65 yards

This 65 mm watch glass is useful as a beaker cover to prevent condensation escape and as an evaporating dish

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Two-ounce capacity with 30 mm stem, 6 mm-diameter stem opening. Use 11 cm filter paper.

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Learn about nature in your own backyard with this well-written, vibrantly-illustrated habitat study book.

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This 500 ml bottle of bromothymol blue is a pH indicator. It is yellow at 6.0 pH, blue at 7.6 pH, and green at neutral pH. Find the bromothymol blue formula, density, and more below!

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