John F. McIntosh

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A system is described for the interactive digitizing of polygons for such two-dimensional spatial modeling applications as growth studies and thematic map production. A digitizer connected online to a mini-computer with a refresh display is used for capturing polygon data from source documents. An area boundary network is developed by digitizing nodes,(More)
As the result of past metabolic studies, especially those of Hender-son and Palmer (12) it is known that the non-volatile acids produced in excess of fixed base by human metabolism are excreted in the urine in two forms, viz., as free acids, and as ammonium salts. Since the kidney is unable to form urine with a pH much lower than 5.0, it can excrete, in(More)
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