Document 6X7y31m6bbMZ6ZpJL1VZq3r3

mrnmz-miQx 1 ?ho results attached were obtained by a sltilled ; technical assistant in examining fifty field of etaadar-d type ; '(oacu containing appvoK&aately (avoxago) er2 throe1rt.ee>. : VJhen no stippled erythrocytes are encountered m fifty fields* ! or v h m the nwfcers are free* 1 to 9 the result its wholly nowaal j i.e* physiological* Figaros of lu or above are lose common but 1 occur occasionally in c o xei&X Individuals * It will bo observed that the one result vhica is at the upper n o r m ! or lower abnormal 111;lit* has occurred m a fiicx (stover}^ whoso blood lead level is relatively high* *hi* however* m y well be a satter of pure- chance* 2t is ou: general expo? iemco that the exasainaiion or the blood for stippling as a means of ectimting tb ichificanco of lead expoe-uro - and especially that which is within or near the threshold 0 1 safety is almost* if not wholly* useless. On the other hand* negative results* when ro@avdo& as a phenomenon expressive of group ~ rattier turn imliviclmi - status* are suedestive of sale conai- tiens or exposure 1 would not depend oa the too strongly * but still X regard than as corroborative evidence of slight or ao2i~ existent bacard . r?3 --------- wym ^ o b e r i a * iwcfioe# a . &>* KE