462 Hiuminating Gas from Cotion Seed. 
of lime,and the completeness of the parts is quite as surprising 
as the magnitude of the whole. It is only doing justice to the 
proprietor to state that it is the result of individual enterprise 
and ingenuity, operating at first on a small scale. 
Lithography. 
{ have been much interested also in visiting a lithographic 
establishment here,which furnishes much encouragementto our 
countrymen to attempt the imitation of European arts, al- 
though they may have only descriptions to guidethem. The 
proprietor has never visited any other lithographic presses; but 
employing his own ingenuity in adopting and improving the 
methods described by the foreign lithographers,he has brought 
the process to a degree of perfection which renders it perfect- 
ly adequate to the production of fine drawings and excellent 
fac similes, and all the purposes to whichit has been applied 
en the continent. 
Arr, XVH.—Illuminating Gas from Cotton Seed. 
Iw the eighth volume of this Journal, we published some 
experiments of Professor Olmsted on an illuminating gas, 
which he had obtained from Cotton Seed. The superior 
quality of the gas, the facility with which it is obtained from 
the seed, and the exhaustless abundance of the material in 
the southern states, suggested the probability that this arti- 
cle, whichas is said constitutes by weight nearly three-fourths 
of the entire cotton crop, and which as we are assured, is 
now, in most of the cotton districts, neglected as useless, 
might be found an eligible substance for gas-lights, especially 
in the United States. 
Not having repeated the experiments of Professor Olmsted, 
and understanding that a very inferior gas had been obtained 
by managing the decomposition ina manner different from 
ihat directed in the original memoir, we requested Professor 
Olmsted to repeat the experiment in the laboratory of Yale 
College. The result was entirely satisfactory—the gas was 
easily and abandantly obtained, and afforded a degree of il- 
