AbstractsMedical & Health Science

"A knowledge of the amounts of water and sand that will be discharged by classifier spigots under various conditions is of considerable importance in the design of classifiers. Suppose it is desired to discharge fifty tons of sand with an average diameter of 2 m.m. through a spigot orifice, the sand being mixed with 100 tons of water and the entire amount of the mixture being discharged in ten hours from the spigot, which is submerged to a depth of two feet under the water. How large a spigot is required? Problems such as this are by no means uncommon. While in many cases they may be solved by guess and trial, still the knowledge of even a limited amount of data on the subject would materially increase the accuracy of guesses and decrease the number of trials necessary to a solution of the particular problem. It was with the idea of securing such data and determining the influence of various factors upon efficiency of discharge of classifier spigots that this investigation was started" – p. 3.