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[[underlined]] 3 [[/underlined]]

The physical apparatus belonging to the Smithsonian Institution has been transferred to the National Museum and placed in cases. The arrangement has been necessarily very unsystematic, owing to the limited space at my disposal, but in a general way it is [[scribble]] classified under three heads [[viz?]], apparatus for experiments on sound, heat and light, and electricity. A list of the instruments in the collection (which is of interest [[scribble]] as having been used by Professor Henry), is in course of preparation. In connection with it may be mentioned the relics of electrical and chemical apparatus of Dr. Joseph Priestley, which is on exhibition in the same place.

[[signed]] R. Hitchcock [[/signed]]