New York Weather Bureau. 509 



not more, with deforestation. In this locality there is not more 

 thain one-half the tree and forest growth standing, compared 

 with whait existed fifty-five year® ago." 



VI. DERIVATION OF TEMPERATURE AND RAIN- 

 FALL NORMALS. 



The temperature and rainfall data given in the preceding pages 

 were derived from the following sources: 



1. Observations tal^en at various academies of the State be- 

 tween the years 1826 and 1868, under the supervision of the 

 Board of Regents of Nev^? York. The results were published in 

 two volumes, the first covering the period 1826-1850 and the sec- 

 ond from 1850-1868. 



2. Monthly and annual normals given in Nos. 277 and 353 of 

 the " Smithsonian Contributions to Knowledge," published in 

 1876 and 1881. The data presented in these works were derived 

 by Mr. C. A. Schott from all available sources, including the first 

 series of New York Regents' reports, the records taken under 

 the supervision of the Smithsonian Institution, the U. S. Army 

 and the U. S. Patent Office. 



3. Records of stations of the National Signal Service and 

 Weather Bureau. 



4. The repoirts of the New York State Meteorological Bureau, 

 issued monthly, 1889-1892, from Cornell University. 



5. Miscellaneous records published in the United States 

 Weather Review or furnished to ithe writer by iindeipetndeait ob- 

 servers. 



Temperature Normals. 



Owing to the large differences which obtain between the tem- 

 perature of the same month in successive years, reliable average 

 or normal values can be derived only from records extending 

 over a long period. Such records are not numerous in this State; 

 and ffew of those which exist have been obtained under pre- 

 cisely the siame circumstances from first to last. Satisfactory 



