Jan., 1962
NICKEL CHLORIDE-CESIUM CHLORIDE PHASEDIAGRAM
of a transition metal ion with an absorption band will reduce the intensity of the transmitted radiation but will not markedly change the intensity of the b.b.r. I n such a case the b.b.r. correction will be larger than in the pure solvent. The additional correction was found to be only 0.020 O.D. units in the range 1300-2100 mp a t 900’ with a 1O.D. neutral density screen in the light path. The magnitude of this effect, though small, must be taken into account for quantitative measurements. A calculation was made of the ratio of energies emitted per cubic centimeter by two black-bodies at, temperatures Yt and T2, respectively. From Planck’s equationas one easily obtains for this ratio at a particular wave length X
The temoerature of the tungsten lamD filament was determined with an optical pyrometer and found to be -2400’. Using the values 270OoI
