MEMOIR OF GUYOT. 715 



great ice-mass that oiice covered all Switzerland." Guyot, besides, 

 found much gratification in the successful work of his pupils in Rocky 

 Mountain exploration and the large additions to the collections thus 

 secured. The memoir of Guyot, by William Libbey, jr., vice-director 

 of the museum, speaks of the museum as the most substantial monu- 

 ment that Professor Guyot has left behind him in Princeton. 



Meteorological and Geographic Worfc, 1849 to 1881. — At the Philadelphia 

 meeting of the American Association in 1848, where Guyot went with 

 Agassiz soon after reaching the country, he met Professor Henry, of the 

 Smithsonian Institution, and this meeting was soon followed by the 

 perfecting of plans for a national system of meteorological observations. 

 Guyot was charged by Professor Henry with the selection and ordering 

 of the improved instruments that were required; and among his changes 

 he rejected the old barometers in favor of the cistern barometer of Fortin 

 as improved by Ernst and further improved in accordance with his own 

 suggestion as regards safety of transportation, making what is now the 

 Smithsonian barometer. He also prepared directions for meteorolog- 

 ical observations, which were published by the Institution as a pamphlet 

 of forty pages in 1850, and a volume of meteorological and physical 

 tables, which was printed and distributed in 1852. The latter very im- 

 portant work was afterward enlarged and became, in the edition of 

 1859, a volume of 634 pages, containing over 200 tables admirably ar- 

 ranged and adapted for the best meteorological and hypsometric work.* 

 A letter of his to Professor Henry in 1858 says that two-fifths of the 

 pages of tables, representing 68,000 computed results, were wholly new 

 and were prepared for the volume. He adds: "It is essentially a work 

 of patience, in doing which the idea of saving much labor to others and 

 facilitating scientific research is the only encouraging element." 



One important part of Guyot's meteorological labors consisted in the 

 selection and establishment of meteorological stations. With this ob- 

 ject in view, he made in 1849 and 1850, under the direction of the regents 

 of the University of New York, in conjunction with the Smithsonian 

 Institution, a general orographic study of the State of New York in 

 order to ascertain the best locations for such stations. Tliirty-eight 

 stations were then located by him at points widely distributed over the 

 State ; and, at the same time, patient, earnest Guyot took pains to in- 

 struct observers at the stations in the use of the meteorological instru- 

 ments. Similar work was also done under like auspices in the State 

 of Massachusetts. The report of the regents of the University of New 

 York for 1851 contains the topographical results of the exploration, 

 giving an excellent sketch of the high plateaus and the larger valleys 

 of the State.t The exploration in 1849 extended into the depth of 



*The voliime of tables is No. 538 of the Smithsonian Publications. In 1859 it re- 

 ceived from its author a further addition to its tables of 70 pages, and in 1884 a new 

 and enlarged edition, in preparation since 1879, was issued; forming vol. xxvxii, of 

 the "Smithsonian Miscellaneous Collections." 



t Reprinted in the American Journal of Science, second series, xiii, 272, 1852. 



