BB yy PROFESSOR PIAZZI SMYTH ON 
Appear- PEE: Goneeeen Differen 
Colour of the Intensity | 27c° bY | Micrometer a By Chemical-origin- one 
Gotan Object Observed, generally a black, fixed of Bice or Lesa Reading. ia she data ne aoe = a 3 
Spectrum at Fraunhofer Line. thickness ae a Gr nate g Nor- Angstrom, PLACE, per S35 f 
the Place. of line. | symbol Rey. rial Sale Thalen, &c. |! British Inch. 3 3 i 
Spectrum. BA iq 
Notable haze-enveloped 
group, containing the im- 
portant and thick line 
representing Lavender- 
Hydrogen— 
1st component, - |) 4 19°690 61 880 i 
Qnd, with haze, . .| 4 19°730 61 892 F 
3rd, with haze, .. .| 4 19°790 61 911 1 
Ath, being the first side | & 
of grand line, . .{|10 19°835 61 925 
ere Penis ee Becond 13 
side o e gran 
Tne oe a EEO 19°873 Hydrogen. || 61938] | 2, 
6th, being end of the haze, ; 1 nH 19°975 61 969 eS 
Monday, July 1, 1878. Prisms 8 and 4. Dispersion=14°. 
At Oh. 50m. came a sudden clearing of sky after a cloudy morning. Began immediately to work the apparatus, 
but the day’s measures, from 61 923 to 62 822, are most unfortunately not of the standard degree of definition. 
Lavender - Hydrogen re- 
peated for place only— 
| 
| 
| Ist side," -/10 |} {) 9340)! 61 ogi | tyarogen. || St 928 
2nd do. ; -|10 68 § | 61 935 
Haze, attending it, ends, . 5 : 0°5 HH 9°440 61 958 
Strong hazy band: Ist side, ; 2 =: 9°505 : 61 976 
‘ Dod do +.) blr e = | 9-534 Calefum. 4 61 986 
Weak hazy band, il z=: 9°583 Calcium, 62 002 
Hazy band or line, 2 = 9630 62 017 
Broad hazy band : 1st and sharp side, 3 = 9°674 62 030 
2nd and weak do. 1 == 705 | | 62 040 
Lavender. 
Hazy band or line : Ist side, 3 = 9°786 P 62 065 
2nd do. a= 9-803 t 62 Wah) sebuaiis, 62 070 
Strong line, 3 | 9°842 62 083 
Graduated haze band— 
Ist and faint side, . : 1 = 9°870 62 093 
2nd and strong side,.| 4 = 9910 62 106 
Hazy line, 3 HE 9°955 62 119 
Do. 5 : 3 HE: 9°972 62 126 
Hazy band, . 3 pd 10°045 62 149 
Hazy band line 4 = 10°083 62 162 
Stronger hazy band line, 5 = 10140 Tron. 62 180 
Hazy band line, : ; : 3 = 10173 62 191 
hice ateeonuer part) (eee 10-218 62 204 
st ana stronger pa ; 
2nd and weaker st sibs bo ¢ lant 10°285 Manganese. | ea7nean 
Faint haze band, 1 = 10°344 62 246 
Stronger haze band, . ‘ ; : 2 = 10°395 62 262 
Still stronger haze_ band, 
sharpest on 2nd side, “ willl | 10°435 62 276 
Faint haze band, ; : ; 2 = 10°490 62 294 
Very strong haze band line,| 5 = | 10515 |62 305| Calcium. | 62 302 
| Powerful hazy group— i a 
Ist and stronger part, | 6 Hi 10°556 §|| 62 315]} 45) 
2nd and weaker part, ° 3 HH 10°604 (|| 62 830 |) | 
Hazy band line, 2 = 10°662 62 349 
Do. do. 2 = 10°715 62 366 
