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, 



