122 Mr, Herschei on the Action of [Feb. 



Table L-— Sulphate of Baryta. Thickness of Plate z=:0*l\96^in. 



CiNrresponding 

 inclinations. 



Ordinary pencil. 



4S053' 

 46 



46 



46 58 



47 53 



48 51 



50 58 



»3 



53 1 



54 8 



S5 25 



56 33 



57 SO 



57 50 



58 15 



b» 12 

 60 45 



62 



62 58 



63 25 



64 28 



65 40 

 67 30 

 69 15 



134° 3T 

 133 42 

 132 45 

 132 

 131 37 

 131 

 130 45 



129 30 

 128 58 



127 45 



126 50 



125 47 



125 30 

 125 



124 30 



123 30 

 122 15 



121 

 120 15 



119 35 



118 20 

 117 40 

 117 5 

 116 25 

 115 35 

 114 47 

 113 20 

 111 30 

 110 



Bluish white 



Light blue 



Sombre greenish blue. 



Pink 



Bluish green 



Rich pink 



Whitish 



Splendid green 



Blue 



Crimson 



Yellow, inclining to orange 



Yellow 



Blue green , 



Blue 



Purple 



Rich crimson red 



Fine orange 



Pale orange yellow 



White 



Dirty and very sombre 

 purple 



Sombre and narrow pinkish 

 red 



Very pale violet or pinkish 

 white 



White 



M'^hite 



White slightly yello'wish . . 

 Pale and dirty olive green. 



Very narrow violet 



Blue, very sombre and nar- 

 row 



Light blue 



Bluish or greenish white . . 



Yellowish white 



Light yellow 



Dull orange pink 



Sombre purple 



Blue 



Pale green 



Pale yellow 



Light yellowish pink 



Rich pink 



Pale purple. 



Blue green 



White 



Pink 



Pale purple. 



Greenish blue 



White 



Pink 



Greenish blue. 



Pink 



Pale greenish blue 



Extraordinary. 



Very pale blue green .... 



Pink 



Heautiful green 



Dull purple 



flich crimson 



Yellow 



Fine green 



Blue 



Purple 



Rich crimson 



Orange 



Pale yeDow 



Pale green or greenish white 



Light blue 



Dark blue 



Sombre and very narrow 



purple 

 Scarlet or fiery red 

 Orange 

 Ruddy white, or very pale 



orange 



White 



White 



Greenish white 

 Dirty bluish green 

 Narrow and very sombre 



violet purple 



Violet 



Violet white 

 White 



White slightly yellowish 



Pale yellow 



Indiflferent purplish pink 



Sombre and narrow purple 



Dark blue 



Pale greenish blue 



Pale yellow green 



YeUow 



Fine pink verging to crimson 



Purple 



Greenish blue. 



Bluish green 



Greenish white 



Crimson 



Very pale purple 



Blue green 



Whitish 



Pink 



Dull purple 



Hluish green 



Pink 



Pale greenish blue 



Pale pink 



Tints beyond 

 the poles. 



Remarks, &c. 



Virtual pdes 

 ;;,p',orpoiBt8 

 of coincidence 



ThepolesPP' 

 Tints between 

 the axes. 



