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Informs JH that he has been appointed member of a B.A.A.S. committee to translate and publish in England foreign scientific memoirs.
Informs JH that the B.A.A.S. has again placed him on a committee to translate and publish foreign scientific memoirs.
Informs JH that the B.A.A.S. has placed him on a committee to provide two actinometers for observing high in the Alps.
Informs JH that the B.A.A.S. has placed him on a committee to study the possibility of using balloon ascents to study the upper atmosphere.
Informs JH that the B.A.A.S. has again placed him on the committee to supervise the translation and publication of foreign scientific memoirs.
JH continues to serve on the committee to supervise and translate foreign scientific memoirs [see JP's 1840-10-19].
Informs JH that the B.A.A.S. has placed him on a committee to conduct experiments by capture balloon on the atmosphere.
Informs JH that the B.A.A.S. has place him on a committee to conduct experiments by capture balloon on the atmosphere.
Informs JH that the B.A.A.S. has placed him on a committee to supervise the translation and publication of foreign scientific memoirs.
Informs JH that he is to work with a committee of the B.A.A.S. to prepare a map of the distribution of coal around the world.