"The Uffenbach brothers are in Amsterdam, sitting in with a lecture of the anatomy professor Ruysch. Uffenbach describes several anatomical preparations and curiosities. Rau ensures them that Ruysch's preparations are painted and varnished. Uffenbach mentions that Ruysch had preparations of embryos in every lifestage. Uffenbach comments on his insects, and refers to Merian's prints."