ADVERTISEMENT. 
: - - d 
Nearty seventeen years have elapsed since the Puitegornicat 
JourNaL was commenced by Mr. Nicuoxson, and sixteen since the aps 
pearance of the first Number of the Puttosopnicar Macazine, - 
During this period the sciences and arts have miade the most rapid pro= 
ress. Numerous Philosophical and Mechani:al Instruments and Machines 
fave been invented and improved :+-the theory and practice of Astrononry 
has been greatly advanced :—new Planets have been discovered, and thé 
structure of the Sim more clearly ascertained. The Rays of Light have: 
been subjected to new experiments, which have demonstrated their sepa- 
rate and distinct powers of illuminating and of heating; and that» won 
derful property upon which the phenomena of the Island Crystalde- 
pend, but which is now known to be inherent in both kinds of rays, and 
universally operative in all the cases of Reflection and Retraction. ‘Che- 
tistry has a second time, within the above period, tecome a new Science, 
~—by the discovery of the effects of Galvanism: upon. its processes, and. 
the development of elementary substances of higher simplicity than were 
before known ;—by the ‘definite proportions of the component. parts of 
bodies ;—by the laws of Elective Attractions and of crystalline forms ;— 
and, even to a c#rtain.extent, by a discovery of the remoter causes of, 
those laws and forms. ,he cultivators of the Sciences, the directors of! 
the operations of the Arts, with public Institutions. and Societies, have) 
become every year more numerous and rapid in their increase; at the 
same time that new Roads, Bridges, Canals, and other National Works, 
as well as private undertakings, have been every where established to an: 
unprecedented extent. f 
Under such circumstances of national vigour and exertion, we have 
found the situation of Journalists of the Discoveries and Improvements 
made by Philosophers and Men of Research, in every part of the civie 
lized world, to be most honourable and truly gratifymg. “Public appro- 
bation, private friendship, and a reasonable remuneration, have consti- 
tuted our reward. Upon various occasions, however, our Correspondents 
have complained that the same Academical F'apers, and Articles of Infors 
mation, have been printed in beth Journals ; and they have, inv’ ir sepas 
rate letters, requested us to consult together upon some means ¢ : remedy- 
ing this inconvenience, and increased expense upon many of our Readers. 
Lut it seemed impossible to obviate this inconvenience in two distinct 
works; both equally under engagements to present to the Public every 
thing that might prove new, interesting, and valuable. We have conferred 
upon this and other considerations” which raight render our intercourse 
with the public more effectually useful; and the result of our deliberas 
tions has been, that it would certainly be best that we should unite, and 
that the joint product of our exerticns and our correspondence should’ be 
consolidated in one Periodical Work; affprding all that has hitherto been 
considered as desirable in the plans and. ¢onduct of both; bu 2& from 
the objection just stated, aud perhaps.one or two more.upon waich it is 
needless to enlarge. a ora 
The Philosophical Journal will henceforth be discontinued; and TA 
Philosophical Magazine will be conducted by Wirtiam Nicuotson anc 
Axvexanper Tittocn, in the same manner as it has always been carries 
en; but with every attention to improvement which the joint exertions 0} 
the Editors, and the Communications of their Friends and Correspondent 
ean afford. 
Mr, Nicuorson, therefore, requests from his Readers a continuance 
that intercourse with which he has so long been gratified ; and that thi 
patrons of the Philosophical Journal will give their orders for the Pailos 
phical Magazine and Journal, through the medium of their own Book 
sellers, as usual. Communications, addressed to the Editors, Pickett Place 
Temple Bar, will meet with due attention, 
owdon, Dec, G1, 1833 , 
