photographs
Butler sitting on a bench in an auditorium with an open book in his lap.
Richards sitting with equipment in his hand.
Dreyer sitting at a table in front of a plate full of grains of sand.
Grand sitting at a lab bench
Navez sitting at a desk, holding a piece of lab equipment.
Condor sitting with his right arm placed on an empty table.
Ferguson sitting at a desk with a pen in his right hand and next to an open book.
Tisellus sitting at a desk with a large book and several documents.
Brooks sitting at a desk with some documents in her hand.
Dubuy sitting at a lab bench with her hands in her lap.
Grave sitting in a chair, with his hands folded in his lap.
Graham sitting at a lab bench working with a piece of equipment.