Copy Photograph: [Teacher] in front of a black-board

Scope and Content

COPY PHOTOGRAPH: [Teacher] in front of a black-board explaining diffusion of gases and jars of chemicals.

Access Information

Dim cyfyngiadau/ No Restriction

Note

Os gwelwch yn dda archebwch y dogfenau gan ddefnyddio y rhif cyfeirnod amgen (lle ddarperidd) / Please order documents using the alternative reference number (where provided)

Physical Characteristics and/or Technical Requirements

Cyflwr da / Good condition