. The Bell System technical journal . FIRST CYCLE DESORPTION ot SECOND CYCLE ADSORPTION oj SECOND CYCLE DESORPTION ^ THIRD CYCLE ADSORPTION • ADSORPTION AFTER REDRY-ING AT I05°C V \ \ \^ ^ i % SLOPE= ^ V i i \ ^ \ \ \ Vj \ \ \ \ K. X k , ^ LOG PER CENT MOISTURE CONTENT Fig. 2—Relation between log of per cent moisture content and log insulation re-sistance of raw cotton at 25° C. ELECTRICAL CONDUCTIVITY OF COTTON 439 LOG PER CENT MOISTURE 30 40 50 60 70 RELATIVE HUMIDITY IN PER CENT Fig. 3—Relations
. The Bell System technical journal . FIRST CYCLE DESORPTION ot SECOND CYCLE ADSORPTION oj SECOND CYCLE DESORPTION ^ THIRD CYCLE ADSORPTION • ADSORPTION AFTER REDRY-ING AT I05°C V \ \ \^ ^ i % SLOPE= ^ V i i \ ^ \ \ \ Vj \ \ \ \ K. X k , ^ LOG PER CENT MOISTURE CONTENT Fig. 2—Relation between log of per cent moisture content and log insulation re-sistance of raw cotton at 25° C. ELECTRICAL CONDUCTIVITY OF COTTON 439 LOG PER CENT MOISTURE 30 40 50 60 70 RELATIVE HUMIDITY IN PER CENT Fig. 3—Relations between relative humidity, moisture content and log insulationresistance of water-boiled cotton at 25° C. 440 BELL SYSTEM TECHNICAL JOURNAL fi 2 <o z O — LFGFND — 1 qJ first cycle adsorptionro first cycle desorption \ \\ \ SLOPE= i \ \ \ % \ \ w \ K \ \\\ 6 8 10 12 14 MOISTURE CONTENT IN PER CENT Fig. 4—Relation between per cent moisture content and log insulation resistance of raw cotton at 25° C. ELECTRICAL CONDUCTIVITY OF COTTON 441 This evidence is considered to indicate the close control of thetesting conditions made possible with the dynamic method, andsuggests that the decreases in area in the loops obtained by Sheppardand Newsome may be due to small variations in thermostat tem-perature about a mean value. On absorption this would have theeffect of giving too high a moisture content at equilibrium, due tohysteresis; on desorption the equilibrium value
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
