Cite

"Crookes Tube, Showing Shadow."

MLA

Hansen, Bert, 1944-. "Crookes Tube, Showing Shadow.". Box 12, folder 22. 1896 February 15. https://collections.library.yale.edu/catalog/32326640.

APA, 6th edition

Hansen, Bert, 1944-. (["Box 12, folder 22"])(1896 February 15)["Crookes Tube, Showing Shadow."]. https://collections.library.yale.edu/catalog/32326640.