THE INCORPORATORS 145 
which Libbey has called “ The most substantial monument that 
Professor Guyot has left behind him in Princeton.” 
Soon after coming to the United States, Guyot made the 
acquaintance of Joseph Henry, who consulted him regarding 
the development of the system of meteorological observations, 
and also entrusted him with obtaining improved instruments. 
He prepared directions for meteorological observations for the 
Smithsonian Institution in 1850, and a volume of meteorological 
and physical tables, which was published originally in 1852, and 
has passed through several editions. Under the joint auspices 
of the Smithsonian Institution and the State governments of 
New York and Massachusetts, Guyot located meteorological 
stations throughout the States mentioned. In 1861, on the occa- 
sion of a visit to Europe, he instituted a comparison of American 
and European barometers. “It is believed that these compari- 
sons establish a correspondence of the European and American 
standards within the narrow limit of one or two thousandths of 
an inch.” (Henry.) 
For thirty years Guyot carried on, largely with the encourage- 
ment of the Smithsonian Institution, extensive barometric 
investigations throughout the mountain ranges of the Atlantic 
slope, from the White Mountains of New Hampshire to the 
Smoky Mountains of North Carolina. He made thousands of 
barometric measurements of altitudes, including those of Mount 
Washington and other high peaks, which were remarkable for 
their exactness. 
He died at Princeton on February 8, 1884. 
(From JAMes D. Dana, in Biographical Memoirs of the National Academy of 
Sciences, vol. 2, 1880, pp. 309-347.) 
JAMES HALL 
Born, September 12, 1811; died, August 7, 1898 
James Hall was of English parentage, and was born in Hing- 
ham, Massachusetts, on September 12, 1811. In 1831, he began 
studies in natural history under Amos Eaton at the Rensselaer 
School (now the Polytechnic Institute) in Troy, New York, 
