Replica, Hooke's hygroscope, made by G.H. Gabb
Replica, Hooke's hygroscope, made by G.H. Gabb
Replica, Hooke's hygroscope, made by G.H. Gabb
Replica, Hooke's hygroscope, made by G.H. Gabb
Two tins of 'weather spiders' with leaflet and advertising material, associated with replica Hooke's hygroscope