TABLE 128.- Method of obtaining -log T Log T for values of T from T=1.00 to T=0.100 may be taken directly from the table of mantissas below. For this range the characteristic is zero. Log T for values of T between T=0.100 and T=0.0000 is obtained by taking from the table of mantissas the decimal part of the logarithm corresponding to the number without regard to the position of the decimal point in the number and adding thereto the appropriate characteristic. It should be remembered that if T is expressed as the fractional part of unity TABLE 128.--Method of obtaining —log T—Continued the characteristic is equal to minus the number of zeros between the decimal point and the first significant figure. Thus, the characteristic of T=0.5 is 0; that of T=0.005 (0.5 percent) is -2; etc. EXAMPLE 1.-To find -log T if T=0.00543. In the table of mantissas the mantissa corresponding to 543 (disregarding the position of the decimal point) is -0.26520. Since there are two zeros between the decimal point and the first significant figure the characteristic is -2. Adding these, log T-2.26520 and -log T +2.2652. Mantissas for numbers from 0 to 1-Continued TABLE 129.-Refractive inder of lerulose solutions [All data computed from weights in air with brass weights. Immersion readings are referable solely to the scale of arbitrary units proposed by Pulfrich (Z. angew. Chem., p. 1186, 1899). According to this scale, 14.5-1.33300; 50.0= 1.34650, and 100.0 1.36464] |