SI'S 



KEGEETTI AND ZAMBEA, HOLBOEN VIADUCT, E.G., 



FIG. 1356. 



FIG. 1357, 



1354 



1355 

 1356 

 1356* 

 1357 



1358 

 1359 

 1360 



1361 



1362 

 1363 



FIG. 1355. 



s. d. 



Pocket Sun Dial Compassses, in oblong Boxwood case, 

 with Equation Table 



Ditto with best Bar Needle ditto (fig. 1355) , 



Sun Dial Compasses, in common round wood case (fig. 1356) 



Ditto ditto, best Mounted 



Ditto ditto, in Square "Wood case, Agate Centre, best 



mounting (fig. 1357) 12 6 



Ditto ditto, Round Metal Case, with cover and stop . 



Ditto ditto, German silver Nickel Plated as (fig. 1359) 



s. a- 



11 

 12 

 2 

 11 



15 

 12 

 16 



Starlight or Moonlight Compasses, with transparent glass dial, and bar needle, 

 for the use of travellers by night, or by the light of a match or cigar, held 



220 



110 1 15 



beneath it, in leather case 



Gregory's Compass for Equestrians, the Needle or Card 



being mounted on two centres to prevent oscillation, 



plain mount ......... 



Ditto ditto, best mounted in Silver Hunting case, 



watch form as fig. 1344 ...... 



Symons' Patent True North Compass, in Square 



Mahogany Box, with Agate Cap and Stop (fig. 1363) 10 

 Ditto Ditto, Trinket or Charm Form, 



Gold 2 10s. ; Silver, 1 2s. 



6 



3 10 6 



12 6 



The true Magnetic Westerly Variation of the Compass (November, 1885) for 

 London is 18 20' at Kew, 18 Greenwich. The Annual decrease, 8' The daily 

 Oscillation 10'. 



Maximum Easterly Variation yet recorded was observed by Burroughs in 

 1580, viz., 11 17'. 



Maximum Westerly Variation observed by Colonel Beaufoy in 1815, 24 27' 18". 



Years of no Variation, 1657 to 1662. 



" As regards the Direction of the Wind, it is hardly necessary to observe that 

 this should always be given according to True and NOT to Compass Searings. The 

 amount of Variation of the Compass in the British Islands being, roughly speak- 

 ing, two points to the westward." 



SHIPS' OR POCKET COMPASSES REPAIRED AND ADJUSTED. 



