234- Prof. Dove's Outlines of a general Theory of the Winds. 



returns to the former point, at least before it has gone through 

 the whole circle. 



u If the south wind begins to blow for two or three days, 

 the north wind will sometimes blow suddenly after it : but if 

 the north wind blows for the same number of days; the south 

 wind will not rise till after the east has blown a while." 



2. France, about 1700. (Mariotte on the Nature of Air, 

 p. 160.) 



" When the north and north-east winds cease, the east ge- 

 nerally succeeds, and then follow the south and south-west 

 winds. The south and south-west winds generally succeed 

 the east in the temperate zones, and especially in France. In 

 France the winds pass from east to south and to south-west, 

 then to the west, to the north and north-east, and very seldom 

 make an entire circuit in a contrary direction." 



3. Germany, 1722. (Sturm, Physica elect iva sive hypothe- 

 tical torn. ii. p. 1206.) 



i( Non vagatur tamen sine omni regula irregularis etiam 

 haec flatuum aereorum variabilitas. Ex multis enim retro 

 annis, et his ipsis, quibus haec scribimus, diebus, noviter ob- 

 servavimus, esse quandam illorum periodicam circulationem, 

 ita ut occidentalem excipiat ut plurimum ac ordinarie septen- 

 trionalis, hunc sequatur gradatim orientalis, deinceps auster 

 in occidentalem iterum paulatim determinetur; non neglectis 

 equidem plagis intermediis, et raro admodum in contrarium 

 verso hoc ordine, vix unquam saltern (si forte ab occidente in 

 meridiem flectatur) ultra orientis terminos excurrente, tantum 

 abest, ut plenum retrogradationis circulum facile absolvat; 

 cum alterum ilium directionis frequentissime, saepius uno 

 mense pluries, decurrat : adeo ut haec una videatur inde re- 

 perta nobis via, qua citra multae artis subsidium, futuras aeris 

 mutationes, in proximos saltern dies, praesciri, et absque fre- 

 quenti errore praedici queant: id quod multiplici experimento 

 compertum habemus." 



4. Italy, 1774. (Toaldo on Meteorology applied to Agri- 

 culture, p. 62.) 



" In fact, if there be no obstacle, the winds go the round of 

 the horizon with the sun." 



5. Southern France. (Poitevin on the Climate of Mont- 

 pellier, p. 65.) 



" When the winds have blown from the south and south- 

 east with violence and brought rain with them, they run 

 through the south-west and west points of the compass, and 

 terminate with north-west, which brings back fine weather. 



" The north and north-east winds often pass over the east 

 and are succeeded by sea-winds (SSE.). It is very seldom 

 that the north winds veer directly to north-west; however 



