ro cy tes ▁are ▁an uc le ate ). ▁Moreover , ▁he ▁found ▁that ▁if ▁he ▁let ▁ch ick ▁er yth ro cy tes ▁remain ▁outside ▁the ▁body ▁for ▁hours , ▁they ▁did ▁not ▁lose ▁their ▁nuc lei . ▁Thus , ▁he ▁concluded ▁that ▁the ▁blood ▁st ains ▁could ▁not ▁have ▁been ▁ch icken ▁blood . ▁The ▁suspect ▁subsequently ▁conf essed . ▁ ▁Bibli ography ▁His ▁bibli ography ▁includes ▁ 5 5 3 ▁works . ▁ ▁Cit ations ▁ ▁References ▁ ▁External ▁links ▁▁ ▁Le id y ▁was ▁the ▁first ▁president ▁of ▁the ▁American ▁Association ▁of ▁An atom ists ▁( 1 8 8 8 - 1 8 8 9 ) ▁▁▁ ▁Chap man ▁Henry ▁C . ▁ 1 8 9 1 . ▁Mem oir ▁of ▁Joseph ▁Le id y , ▁M . D ., ▁LL . D . ▁Pro ceed ings ▁of ▁the ▁Academy ▁of ▁Natural ▁Sciences ▁of ▁America , ▁Academy ▁of ▁Natural ▁Sciences , ▁Philadelphia . ▁ ▁Pers if or ▁Fra zer . ▁ 1 8 9 2 ▁( J anu ary ). ▁Joseph ▁Le id y , ▁M . D ., ▁LL . D . ▁The ▁American ▁Ge ologist , ▁Philadelphia . ▁The ▁Joseph ▁Le id y ▁on - line ▁exhib it ▁at ▁the ▁Academy ▁of ▁Natural ▁Sciences ▁The ▁Joseph ▁Le id y ▁Micro sc opy ▁Portal ▁▁ ▁View ▁works ▁by ▁Joseph ▁Le id y ▁online ▁at ▁the ▁B iod iversity ▁Heritage ▁Library . ▁National ▁Academy ▁of ▁Sciences ▁Bi ographical ▁Mem oir ▁ ▁Category : American ▁pale ont olog ists ▁Category