153 
“ARTIFICIAL ILLUMINATION,” GAS AND ELECTRIC, WITH 
SPECIAL REFERENCE TO THE MODERN DEVELOPMENTS OF 
GAS LIGHTING, EXPERIMENTALLY AND PRACTICALLY 
ILLUSTRATED. 
BY 
PROFESSOR CARLTON LAMBERT, M.A., 
Royal Naval College, Greenwich. 
(A Lecture delivered at the Royal Artillery Institution, Woolwich, 16th December, 1895). 
Cononen C. C. Trencu, Director ARTILLERY ConnEGE, IN THE CHAIR. 
Tae CHarrman—I need not introduce Professor Lambert to you, 
gentlemen (applause). I am afraid the Professor is at a great dis- 
advantage to-night, because I understand the gas pressure is nothing 
like what he requires for his work. 
Prorsssor Lampert—Colonel Trench, ladies, and gentlemen, I am 
very sorry to have to announce to you that in one respect, at any rate, 
I am, as the Chairman has already told you, at a disadvantage, be- 
cause we find that the gas supply by which the table is served is so 
deficient that we have absolutely not enough pressure for a single 
burner. However, you will perhaps kindly exercise your powers of 
imagination and fancy, when you see a feeble light, that it is an 
exceedingly brilliant one. 
I do not propose this evening to confine myself to the technical part 
of my subject, but to give a little time to the theory; for I am sure 
that we shall be more successful in the use of our illuminants if we 
understand the simple principles upon which the production of light 
from them depends. I am aware that there are in this room many 
to whom the laws of combustion and illumination are familiar, and I 
will ask them kindly to bear with me while I endeavour to make the 
elementary principles clear to those who may not have had the same 
advantages. 
Inasmuch as all illumination is derived, directly or indirectly, from 
combustion, it will be well for us to study for a little while what com- 
bustion really is, and what are the natures of those substances with 
which we are chiefly concerned in the combustion of every day life. I 
will ask you just to look at the screen for a minute or two, and we will 
run rapidly through the few maxims concerning combustion which are 
there indicated. 
4. VOL. XXIII. 21 
