In studies of radiation-induced polymerization, a source of gamma rays was 25 pta) Q2. employed to give measured does radiation. Position, cm, trom base point 127 2 39 2 54 271 3.81 2 98 5 08 3.20 Dosage, 10'rads/hr 1.90 For some reason, the reading at 335 cm was not reported, but the value of radiation there is needed. Fit the second degree Newton's interpolating polynomial using the Divided- Difference table to the data to supply the missing information.