Mr. Winch's Observations on his Flora. 137 



OBSERVATIONS ON THE PRECEDING FLORA. 



Read June 20, 1831. 



In collecting the materials for the preceding Catalogue Raisonne of the 

 Flora of Northumberland and Durham no merit can be claimed, but such 

 as is due to some degree of patience and perseverance, which, in a 

 favourite pursuit, may be considered very trivial indeed. However, it 

 is the result of more than thirty years' attention to our native Botany, 

 and may prove useful to those who shall have leisure and inclination to 

 follow up and extend these researches. The indigenous plants of this 

 portion of England are numerous, considering its northern latitude,* 



* I am indebted to the kindness of Mr. Losh for allowing me to extract the data on 

 which the following table of the temperature of the atmosphere in lat. 55°, is founded, from 

 a meteorological register kept by him at Jesmond, for several years past. The height of 

 the thermometer was noted each day at 9, 2, and 1 1 o'clock, so that the result is drawn 

 from upwards of 2,500 observations. The elevation of Jesmond is about 200 feet above 

 the level of the sea ; and it is distant from the coast between seven and eight miles : — 



1812. 1813. 1814. 1815. 1816. 1817. 1818. 



January, 36| 36£ 28± 331 37 40£ 38 



February, 40f 431 35| 43"" 36 43 32 



March, 371 45 38I 431 371 411 381 



April, 42 47 501 461 41 46^ 42 



May, 51 52f 47| 53J 48| 49 51 



June, 56f 561 53 571 54a 57| 621 



July, 57f 60| 601 58 561 57£ 63 



August, 58 58 601 59 56| 55| 58 



September, 55f 561 561 5 6 i 52 551 55a 



October, 49 47 48 501 44 44 53£ 



November, 42 40 41f 43 391 45a 48f 



December, 37 39| 38i 33 36| 35 40f 



47 48 T ^ 46 T ^ 48.L 45^ 47^ 49£ 



Average temperature of seven years, 47£| degrees, 



VOL. II, n n 



