11. If they did develop tropical sprue , he could treat it with liver extract. 12. Small defects where sprues and vents were attached are filed or ground down and polished. 13. The drag is made in the same way ( without the sprue and pouring cup ). 14. Tropical sprue is largely limited to within about 30 degrees north and south of the equator. 15. They showed that tropical sprue was caused by intestinal impermeability to this and other hematopoietic factors in food. 16. The sand is vibrated to compact the sand and a sprue and pouring cup are formed in the cope. 17. Directional solidification is solidification that occurs from farthest end of the casting and works its way towards the sprue . 18. There were many leading research doctors doing their army internship, studying the cause and treatment of the sprue . 19. A "'sprue "'is the passage through which liquid material is introduced into a mold. 20. The amount of resin required to fill the sprue , runner and cavities of a mould comprises a " shot ".
