IV APPENDIX. 



Fourth column denotes the state of the weather by tlie following letters of tl>e 

 alphabet : 



b — Blue sky ; whether clear or hazy weather. 



c — Clouds ; detached, passing clouds. 



d — Drizzling rain — drift snow in winter. 



f — Foggy, f. — Thick fog. 



g — Gloomy ; dark weather. 



h— Hail. 



1 — Lightning. 



m — Misty, hazy atmosphere. 



— Overcast, or whole sky covered with clouds. 



p — Passing, temporary showers. 



q — Squally. 



r — Rain. r. — Continued rain. 



s — Snow. 



t — Thunder. 



u — Ugly, threatening appearances. 



v — Visible ; clear atmosphere. 



w — Wet dew. 



By the combination of these letters all the ordinary phenomena of the weather may 

 be expressed with facility. Examples: 1st, b c m signifies, " Blue sky, with passing- 

 clouds, and hazy atmosphere." 2d, g v, " Gloomy ; dark weather, but distant objects 

 visible." 3d, qq p d 1 tt, " Veiy hard squalls, with passing showers of drizzle, and accom- 

 panied with lightning, and with very heavy thunder." 



N.B. — In the following tables the first column expresses the day of the month ; the 

 second the direction of the wind expressed fractionally, thus j^^^^ : that is, 4 hours 

 at NNW; the numerator expressing the number of hours, and the denominator the 

 direction: in like manner the force of the wind, state of the weather, and temperature, 

 are expressed ; the numerator being always hours beginning after midnight. 



