Desckiption of the Plates. Ixvii 



dotted lines. The declination, from the last column of Table V., page 337, and of 

 Table IX., page 340. The horizontal component, from the last column of Table 

 XXVI., page 360, and of Table XXIX., page 362. The vertical component, from 

 the last column of Table XLII., page 378, and of Table XLV., page 380. The 

 inclination, from the last column of Table LV., page 391, and from line 19, page 392- 

 The total force, from the last column of Table LVIII., page 396, and from line 19, 

 page 397. 



The meteorological curves are projected from the following Tables : — 



The barometer, from the last column of Table XXII., page 423. 



The temperature of the air, from the last column of Table III., page 407. 



The pressure of aqueous vapour, from the last column of Table XIII., page 415. 



The relative humidity, from the last column of Table XVII., page 418. 



The pressure of wind, from the last column of Table XXXII., page 430. 



The direction of the resultant pressure of wind, from the last column of Table 

 XXXVI., page 439. 



The extent of clouded sky, from the last column of Table XLI., page 444. 



All the reductions connected with the quantities given in this volume have been 

 made by my assistants, Messrs Welsh and Hogg, and by myself : each computation 

 has been performed twice at least, and that generally by different individuals. 



