50 
Proceedings of the Royal Society of Edinburgh. [Sess. 
Table I. 
Distance between 
Adjacent Burners 
(x). 
Illuminating Power. 
Observed. 
Calculated (P). 
_____ . __ 
Series A, 
, Formula: P = 1 + W 1 ' 36 ®. 
•80 cm. 
1-33 
1-33 
•93 „ 
1*27 
1-27 
1-21 „ 
1T9 
1T9 
1-44 „ 
1T4 
1T4 
2-50 „ 
1-04 
1*03 
8-82 „ 
1-00 
1-00 
Series B * P = 1 + 1 -29e _1 ' 8te . 
*77 cm. 
1*315 
1*31 
1-10 „ 
1T7 
1T7 
1*46 „ 
1-095 
1-08 
1-93 „ 
1-035 
1-04 
4-07 „ 
•99 
1-00 
7-09 „ 
1*01 
1-00 
10-2 „ 
1-00 
100 
Series C. P = 1 + e~ v95x . 
•77 cm. 
1-33 
1*36 
•98 „ 
1-30 
1-27 
1-14 „ 
1T9 
1*22 
8-53 „ 
1-00 
1-00 
Series D. P = 1 + l*15<f r80a! . 
•78 cm. 
1-27 
1-28 
•80 „ 
1-27 
1-27 
1-00 „ 
1*20 
1T9 
1-46 „ 
1-08 
1-08 
1-96 „ 
1*01 
1*03 
3-05 „ 
1-00 
POO 
6*13 „ 
1-00 
1-00 
Series E. P = 1 + lT5e- 1,80 * 
•78 cm. 
1-28 
1*28 
•90 „ 
1-23 
1-23 
1-06 „ 
1T8 
1T7 
1-26 „ 
1-09 
1T2 
1-50 „ 
1-04 
1-08 
2 03 „ 
1*01 
1-03 
3*00 „ 
1-00 
POO 
8-00 „ 
1-00 
1-00 
* Taken during four different days. Pressure was not quite 
constant, but the observations were reduced to constant pressure 
by the pressure calibration curve. 
