Index to Part YI. 523 



Jr. PAGE. 



Physical features of New York 417 



Plateaus, dates of frosts iu 470 



description of 417 



thermal conditiousof 444 



rainfall upon 486, 487 



Precipitation, general account of 413, 484 



normal values of 480 



related to forest growths 509 



Pressure, atmospheric, general account of 410 



(See, also, cyclones and anti-clyclones) 



E. 



Raiufall. (See precipitation.) 



Rainy d;iys, average frequency of 493 



Eainy and dry seasons, historical notices of 502, 509 



Ranges of temperature, account of normal 449 



Eegeuts, New York Board of 407, 509 



Relative humidity, account of normal 498 



Rochester, general climatic data for 501 



s. 



St. Lawrence River, dates of freezing 474 



St. Lawrence Valley described 417 



rainfall of 413, 484 



thermal conditions of 437, 444 



Schott, C. A., meteorological tables of 408 



Sea-breeze, general account of 428, 509 



Seneca Lake, duration of ice in 479 



thermal effect of 440 



Smithsonian Institution 407 



Smock, J. C, climatic notes by 502 



Snowfall, general account of 489 



historical notices of 502-509 



Summer, climatic conditions of 415 



raiufall during 484 



Susquehanna Valley, temperature of 444 



