ea ee a a 
oa eee, 
Le ee eR Ne ee. RR Oe ne Se ae et - 
rich gas by dilution with a poor gas of known value. 381 
— ppianolar satisfactory results with the use of this gas, pro- 
it is passed through gas Pee and holders which have 
nae previously used for the transmission of coal gas, since 
Ist. . By Farmer’s Theorem = 30°49 candles, 
2d. “ mixing with poor gas = 30°95 
3d. “ simple ratio 20600. = 
In a . the intensity of this gas by the method of 
mixtures, 20 per cent by volume of Albert ed 
with 80 per cent of. 10°6 candle gas eat om a poor coal, — 
The mixture had an intensity of 14°67 candles. Hence, 
(14-67 — 10°60) x 80+20+14-67=30°95 candles 
for the intensity of the Albert Gas by the method of mixtures. 
lst Experiment. 
Taken 75 volumes of coal gas =14 75 candles, obs’d. 
Hy 25 ” hydrogen sees 
. 1 mixtu 1023: . 
If hyd 0 this mixture sh iahavegiven. 11-06 ca 
Hence there is an error of observation of 84 of a candle, 
which makes the value of the hydrogen —— ela zero. 
2d Experiment. 
Taken : : volumes of coal gas =14- 25 candles, obs’d. 
7 rogen oe 
5 We mixture EHOae . 9 
Hhvwa she ae gee, px a yess ““ eale. 
Hence there is an error of observation which 
a makes the value of the hydrogen, sleet a little iulve 
The want of sufficient Bee room for hydrogen and the 
porte of many repetitions, and much care In manipulation 
errors of coenty in the synthesis of mixtures make 
A oa other lagen — 
prevented my multiplying them as much as is desirable. | I 
think, however, that most photometric observers will ane wi 
me that it is safe to conclude, from these two experiments, that. 
the action of hydrogen in gaseous mixtures is simply that of a 
