SAND-PUMP
\sˈandpˈʌmp], \sˈandpˈʌmp], \s_ˈa_n_d_p_ˈʌ_m_p]\
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A cylindrical metallic case or tube having at the bottom a valve opening inwardly and used for removing the sand which collects in the bore when a well, etc., is being drilled. On the drill being temporarily removed the sand-pump is lowered, the water and dirt force up the valve and enter the tube, the valve dropping again to prevent their return. This being repeated again and again the tube becomes filled, on which it is drawn to the surface and emptied.
By Daniel Lyons
Word of the day
basidiomycota
- comprises fungi bearing the spores on basidium: Gasteromycetes (puffballs); Tiliomycetes (comprising orders Ustilaginales (smuts) and Uredinales (rusts)); Hymenomycetes (mushrooms; toadstools; agarics; bracket fungi); in some classification systems considered a division of kingdom comprises fungi bearing spores on a basidium; includes Gasteromycetes (puffballs) Tiliomycetes comprising the orders Ustilaginales (smuts) and Uredinales (rusts) Hymenomycetes (mushrooms, toadstools, agarics bracket fungi).