82 W.E. A. Aikin on the Illuminating power of Coal Gas. 
Arr. XIU.—On the Variable Illuminating Power of Coal Gas; 
_ by Wiuuiam E. A. AIKIN, Prof. Chem., &c., University ot - 
Maryland.* 
(Read before the American Association for the Advancement of Science, at 
the Baltimore Meeting, May, 1858.) . 
IN common with a large number of our citizens, my attention 
was directed some short time since, to a somewhat sudden, inex 
stances of the decomposition 
made some years ago 
by pushing 
process to completion is very considerable, equal sometimes © 
2 of all that passes over. ° 
How far any neglect in the observance of the precautions 
quired to produce a proper illuminating gas, may explain 
result the public have no means of knowing. All that we <™ 
The title of the above paper was accidentally omitted when the list of F 
read before the Association was published in the uly No. of this Journal. 
