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pass through eight other flames, without its intensity or its 
power of illumination being sensibly diminished. 
I ought to mention that my new lamp has no need of the 
narrow chimney or glass tube to quicken or brighten its 
four flames. It will be sufficient to place over it a large 
■glass muffle, five or six inches in diameter, or more, and 
seven or eight inches high. This muffle is placed on a 
sheet of tin, which has a hole in the centre to admit the air, 
which should always come from below* to support the com¬ 
bustion of the oil. 
I propose to publish a detailed description of this lamp 
as soon as I have brought it to perfection : in the mean time 
I have given a precise idea of the principles on which it is 
constructed, for the information of those who are disposed 
to assist me in completing it. 
¥ 
