Meteorology of N^eio Haven. 195 



These observations were made regularly three times a day, at fixed 

 hours. The thermometer employed was attached to Mr. Beers' book- 

 store, which was on the corner of Chapel and College streets, on the 

 spot now occupied by the New Haven Hotel. It is supposed that 

 this register originally embraced a longer period than is mentioned 

 above, but these years include all which can now be found. 



3. A Register kept by order of the Connecticut Academy of Arts 

 and Sciences. This register has been kept successively by various in- 

 dividuals, upon different plans, and with numerous interruptions. 



A. The register from March, 1800, to Feb., 1803, forms a manu- 

 script volume by itself The observations were made three times a 

 day, at fixed hours. During a part of the year 1801, the observations 

 are in the handwriting of President Day, who was at that time tutor 

 in Yale College. It is not known by whom the other observations 

 were made. 



B. The register from Jan., 1804, to Dec, 1820, was kept by Rev. 

 Jeremiah Day, D.D., who was Professor of Mathematics and Natural 

 Philosophy in Yale College from 1803 to 1817 ; and subsequently for 

 many years President of the College. This register includes observ- 

 ations three times a day, at fixed hours, and substantially the same 

 system of observations was preserved from the beginning to the end 

 of the register. The thermometer employed in these observations 

 was generally placed eight or ten feet from the ground, and was 

 always attached to President Day's house, Avhich was changed several 

 times during this period, but was always within a moderate distance 

 of the college buildings. 



C. The register from Jan., 1821, to Nov., 1830, was kept succs- 

 sively by various individuals and with several interruptions. 



The observations for 1821 were made by Prof A. M. Fisher. Those 

 for 1822 were made chiefly by President Day. From Nov., 1822, to 

 May, 1825, the register Avas kept by Prof M. R. Dutton, but the in 

 terruptions during this period amount to nearly a whole year. From 

 July, 1826, to Nov., 1830, the register was kept by Prof D. Olmsted, 

 wnth a loss of about six months from interruptions. 



Whenever the observer was changed, the location of the thermom- 

 eter was also changed, but the locality was always in the neighbor- 

 hood of the College. 



D. From Dec, 1840, to Aug., 1842, the register Avas kept by Rev. 

 Chester S. Lyman, now Professor in Yale College. The thermometer 

 was attached to Divinity College ; during the first year on the fourth 

 story, and the second year on the third story of the building. In the 

 fii'st position its elevation above the level of the sea was about 65 

 feet, and in the second position about 57 feet. The observations 

 were generally made five or six times a day. 



