Signedin pencil on top of prism: T. L.
printed on letterhead: GRADUATE SCHOOL OF ARTS AND SCIENCES / PHYSICS / GRADUATE SCHOOL OF ENGINEERING / COMMUNICATION ENGINEERING / CRUFT LABORATORY / HARVARD UNIVERSITY/ CAMBRIDGE 38, MASSACHUSETTS
Inscribedin pencil on top of prism: Fused / Qtz
in brown ink on box lid label: Fused Qtz / Prism
printed on cardboard container: "SEALRIGHT" / PAT. 8-7-17 / FULTON, N. Y.