## Empirical equations and nomography |

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9 Diff acid aqueous solutions auxiliary equations average axis calc calculated values cent centipoises Chap Chem Chemist-Analyst column compute concentration connecting constants cosh cubic centimeters D. S. Davis determined diameter empirical equation equation becomes follows freeness functions glycerol graduated grams hyperbolic Hyperbolic Functions Illustration index lines interpolated Lagrange formula length line coordinate chart linear logarithmic form logarithmic paper logarithmic scales McGraw-Hill Book Company mercury methanol modulus molal nomograph observed values ordinary coordinate paper Paper Ind parallel axes partial pressure Percentage deviation obs points pounds Prob pulp ream weight rH rH satisfactory shown in Fig simultaneous solution sinh slide rule slide-rule smooth curve sodium carbonate solubility specific gravity straight line substituting subtraction sulfur dioxide sulfuric acid summation equations tanh terpineol thermal value tion vapor pressure variables various temperatures viscosity volume relation factors width yields zero