310 REPORT—1 885. | 
WAVE-LENGTH TABLES OF THE SPECTRA OF COMPOUNDS. | 
AMMONIA. 
Intensity Intensity } 
Flame Spectrum and Flame Spectrum and 
Character | Character 
bhi Lecoq de ec. Lecoq de | 
aya | Bhisbandral Dibbits Boisbaudran 
ay 6629 lby ¢ J 5807 3s 
 £ 6629 5s 5754 3s 
6542 5s n 5705 | a 5702 8n 
@) "6420 1b, 5664 5s 
6325 n () 5617 2b, 
Y 6293 ©) "5466 5 5470 2b", 
B 6302 6b, 6 5382 8s 
6227 2n 6) 5330 6br 
7 18 n 6180 5n t *5284 e 5252 8b,” 
6117 2n 7) 5158 8bY 
; 6045 7m k 5128 Tbr 
pee, |e {cous 6n A 5079 4b, 
: 5982 6s (8) 4997 7b 
5970 ¢ 5964 5n om 4782 4b,,* 
@) 5834 1b,, 
* Double. 
The spark spectrum of ammonia, according to Lecogq de Boisbaudran, shows one 
broad band at 5657 (5656°5 Schuster) which, with a finer slit ,is resolved into two 
bands, 5681 of intensity 7, and 5643 of intensity 8 (5686 to 5627 Schuster). Lecoq de- 
Boisbaudran obtained the ‘ Flame Spectrum’ also by use of the spark ; its production 
appears to depend upon the presence of oxygen. 
ALUMINIUM OXIDE. 
2 SS a es 2 eas oe ee 
Intensity and 
Lecoq de Boisbaudran Thalén Lockyer Character 
5457 3n 
54385 
5428-5 
5417°5 b 
84 5408 5409°8 5408 1s 
5391 5395-4 5397 2s 
5373 5377°8 3s 
5354 53574 4s 
5331 5333'6 4s 
(5190 51868 5191 . 
15175 5180°5 2s 
5161 5160-4 5166 bb 
, | 51545 
5145 5141-4 6b 
{ 5139°5 
5124 5123'8 5121 8b 
5103 (51022 5100°5 9b 
5080 50754 5080 9b 
4930°5 
4891 4890:2 4901 3b 
as 4871 4864-2 8b 
4845 4839-0 10b 
