Columbia subject headings:
Science--Experiments--History--Congresses.
Science--Study and teaching--History--Congresses.
Scientific apparatus and instruments--History--Congresses.
Harvard subject headings:
Science--Experiments--History--Congresses.
Science--Study and teaching--History--Congresses.
Scientific apparatus and instruments--History--Congresses.
Princeton subject headings:
Science--Experiments--History--Congresses.
Science--Study and teching--History--Congresses.
Scientific apparatus and instruments--History--Congresses.