The date of burning obtained for two flints from the 25m raised beach (level Cla) at the Paleolithic site of Terra Amata, Nice is 230, 000±40,000 B.P. (Ox TL 195a). The thermoluminescence measurements were made on thin slices cut from the flints: a total absorption technique was used for the evaluation of alpha sensitivity and this necessitated measurement of optical transparency. In evaluating beta sensitivity with a radioisotope source due allowance was made for the build-up of dose-rate with depth in the slice. Altogether eight flints were studied but despite visual appearances six of them were found to have been insufficiently burnt for erasure of the geological thermoluminescence. -- AATA