ADVERTISEMENT | 
k a ~ | 
EARLY seventeen years have elapsed since the Putrosopnie 
JOURNAL was commenced by Mr. Nicroxson, and sixteen Si 
pearance of the first Number of the PutLosopuicar Ma 
gress. Numerous Philosophical and Mechanical Instruments and Machin’ 
have been invented and improved :~the theory and Practice of Astron 
has been greatly advanced *—new Planets have been discovered, and. th 
structure of the Sun more clearly ascertained. The Rays of Light ha 
been subjected to new experiments, which have demonstrated their sep: 
rate and distinct powers of illuminating and of heatin $ and that won 
derfui Property upon which the Phenomena of the sland Crystal de 
pend, but which is now known to be inherent in both kinds of ang 
universally operative in all the cases of Reflection and Refraction, Che. 
mistry has a second ' time, within the above period, become a new Science 
—by the discovery of the effects of Galvanism upon its Processes, ang 
become “very year more ntimerous and rapid in, their increase ; at the; 
same time that new Roads, Bridges, Canals, and other National Works, | 
as well as private undertakings, ; 
unprecedented extent. 
nder such circumstances of national vigour and exertion, we have 
found that the situation of Journalists of the Discoveries and Improve. 
Ments made by Philosophers and Men of Research, in every part of the 
civilized world, i most honourable and truly Statifying, Public appro. 
ation, private friendship, and a reasonable remuneration, have COnsti- 
rate letters, requested us to consult together upon some means of remedy-~ 
ing this inconvenience, and increased expense upon many of our Readers, 
ut it seemed impossible to obviate this inconvenience i two distinct. 
works ; both equally under engasements to present to the Public every |] 
thing that might. prove new, interesting, and valuable, We have conferred: 
tions has been, that it would certainly be best that we should unite, and 
that the joint product of our exertions and our correspondence should be 
consolidated in one Periodical Work ; affording all that has hitherto been 
considered us desirable in the plans and conduct of both 3 but free from 
the objection just stated, and Ferhaps one or two more upon which it js 
the Editors, and the Communications of their Friends and Correspondents 
can afford. ° 
Mr. Nicoxson, therefore, requests from his Readers a continuance of 
that intercourse with which he has so long been Statified ; and that the 
Patrons of the Philosophical Journal Will give their orders for the Philaso. 
Phical Magazine and Journal, through the medium of their own Book- 
sellers, as usual, Communications addressed to the Editers, Picket Place, 
ave been every: where established to an) 
\ 
