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parathyroid gland
AC Output:
sound patterns
Premium Quality: Electroscope Goldleaf is made of high-grade construction all the way through
513-77-9) is of extra-pure grade with a minimum purity of 98
Convection in Air Apparatus parathyroid glandAn ideal apparatus for studying convection currents in the Air. Size: 23cm x 10cm x 10cm. This metal box has a glass front and two plastic chimneys. A candle is placed under one of the chimneys causing the convection currents. A piece of touch paper, producing smoke, is held at the mouth of the other chimney making the convection current dramatically visible. Premium Quality: Convection in Air Apparatus is made of high grade construction all the way
US$ 45.00
US$ 45.00
US$ 119.00
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