Ƙungiyar 'yan makaranta da talakawa sun ba da gudummawa, kamar yadda' yan kabilar Faransa suka yi a cikin yakin juyin juya halin Amurka. Ƙananan ra'ayi, gudunmawar ta fito ne daga waɗanda suke fatan samun goyon bayan Amurka a ƙoƙarin Faransa don gina Canal na Panama. Ƙwararrun jan karfe sun fito ne daga wurare da dama kuma wasu daga cikinta sun ce sun fito ne daga wani ma'adinai a Visnes, Norway, ko da yake wannan ba a tabbatar da shi ba bayan gwajin samfurori. A cewar Cara Sutherland a cikin littafinta na shekara-shekara game da mutum-mutumi don Gidan Tarihi na Birnin New York, ana buƙatar fam 200,000 (91,000 kg) don gina mutum-mutumi, kuma masana'antun masana'antu na Faransa Eugène Secrétan sun ba da fam 128,000 (58,000 kg) na tagulla.
New York, Boston, da kuma Philadelphia