272 FRESNEL. 
There exist at present on the ocean and on the Medi- 
terranean twelve light-houses, more or less powerful, con- 
structed on the principles of Fresnel. To complete the 
general system of lighting our coasts, thirty new light- 
houses appear still necessary. Every thing induces us 
to hope that these important works will be promptly 
executed, and that we shall deviate in the least possible 
degree from the happy direction given to this branch of 
the public service by our colleague. Routine and preju- 
dice will here be without power, since the parties inter- 
ested who are the true judges, the mariners of all 
nations, have unanimously proclaimed the superiority of 
the new system. No one can allege pretexts of economy, 
for to produce equal effect, the lenticular light-houses do 
not require so much oil as those of the old construction ; 
are of a much less expensive kind to keep up, and pro- 
cure definitively to the state an annual economy of about 
half a million. This beautiful invention, then, ought to 
prosper at least, if since the death of Fresnel it did not 
fall into the hands of those persons, strangers to the sub- 
ject, who think themselves fit for all employments, 
although, under different states of public affairs, they 
have had no other places of study than the antechambers 
of ministers. Candidates, if I am rightly informed, were 
not wanting; but happily, this time, intrigue yielded to 
merit, and the chief superintendence of the light-houses 
was intrusted to the younger brother of Fresnel, like 
himself a former pupil of the Ecole Polytechnique, like 
himself an engineer of the “ ponts et chausées,’—skilful, 
zealous, and conscientious. 
“Under his inspection, the construction and the dispo- 
sition of great lenses “in steps” has received important 
improvements, and the public will not have to fear that 
