ERRATA. 



Page 33, September 28., 8 p. m., pressure, instead of 53'4, read 57'1. 

 Page 52, March 2., noon, pressure, instead of 25'8, read 26'8. 

 Page 302, May, Minimum 2 a. m., instead of 5'53, read 0'53. 

 Page 304, last Table at the bottom, for Calm 2'4, read 2'1 ; and 



last line, instead of NE, 11-0, read 10-0, instead of Calm Or I, read 0-0. 

 Page 405, Mean Min., instead of - 27'7, read - 2T72. 

 Page 481. Mean v Winter, instead of 2-69, read 2'%. 

 Page 483, Last line, instead of June, read July. 

 Page 504, Table, last line, instead of Month, read Months. 

 Page 591, 3rd line from top, instead of J e , read ', and instead of t, read *', and add 



"' being the terrestrial refraction for the zenith-distance ." 

 Page 591, 12th line and 18 th line from top, instead of *, read e'. 

 Plate VII. Relative Humidity, instead of "by", read "with". 

 Plate VII. Relative Humidity, Diurnal Period, instead of 1 mm., read 1 cm. 

 Plate VII. Relative Humidity, Annual Period, May, instead of 8 1'5, read 82"8; and December, 



instead of 87, read 80'6. 



Plate VII. Cloud, Diurnal Period, Summer 4 a. m., instead of 1'5, read 0-29. 

 Plate VIII. Cloud by Calms, instead of "by", read "with". 

 Plate IX. Prob. of Precip., Annual Period, instead of 1 cm., read 1 mm. 

 Plate IX. Probability of Precipitation. Wind-Roses, instead of 1 pet, read 10 pet. 

 Plate IX. Fog-Prob. Diurnal Period, instead of 10 pcL, read 1 pet 

 Plate IX. Days with Fog, June, instead of 13'7, read 10'3; and July, instead of 13'7, read 20'3. 



