▁He ▁was ▁also ▁the ▁author ▁of ▁another ▁land mark ▁book ▁on ▁development al ▁phys i ology ▁titled ▁Spe ci elle ▁Phys i ologie ▁des ▁Emb ry o ▁( Special ▁phys i ology ▁of ▁the ▁emb ry o ). ▁Both ▁works ▁laid ▁a ▁foundation ▁in ▁their ▁respective ▁discipl ines ▁for ▁future ▁study ▁of ▁modern ▁human ▁development . ▁ ▁At ▁J ena , ▁Pre yer ▁introduced ▁experimental - s cient ific ▁training ▁methods ▁into ▁his ▁lect ures , ▁and ▁also ▁created ▁sem in ars ▁in ▁the ▁field ▁of ▁phys i ology . ▁Today , ▁the ▁" Will iam ▁Th ier ry ▁Pre yer ▁Award " ▁is ▁issued ▁by ▁the ▁European ▁Society ▁on ▁Development al ▁Psych ology ▁for ▁excell ence ▁in ▁research ▁of ▁human ▁development . ▁ ▁Works ▁▁ ▁De ▁ha em og lob ino ▁observation es ▁et ▁experiment a . ▁dis sert ation , ▁( Univers ity ▁of ▁Bonn ) ▁ 1 8 6 6 . ▁ ▁Die ▁Bl ut k ry st alle . ▁J ena ▁ 1 8 7 1 ▁- ▁The ▁" blo od ▁cry stal ". ▁ ▁Natur wissenschaft liche ▁Th ats achen ▁und ▁Pro ble me . ▁Pa et el , ▁Berlin , ▁ 1 8 8 0 ▁- ▁Scient ific ▁facts ▁and ▁problems . ▁ ▁Die ▁Ent deck ung ▁des ▁Hyp not ismus . ▁D arg estellt ▁von ▁W . ▁Pre yer ▁… ▁Neb st ▁einer ▁un ged ruck ten ▁Original - Ab hand lung ▁von ▁Bra id ▁in ▁Deutsch er ▁U eb ers etzung . ▁Berlin : ▁Pa