TO CORRESPONDENTS. , s 
Mr. Uprneron in conclusion ;—Mr. Joun Morray.on ‘Aérolites ;—  § 
Dr. Joser# Reave’s Experiments’ for a New Theory of Vision ;—Mr. Aa 
Henry Mette on finding the Longitude by Lunar Observations ;—and 
JJ Mr. Gavin Ivers on, an old Method of marking Dates on Manuscript 
4) Books, have been received, and will appear in due course. 
Remarks by Mr. WiiuiaM Srewar? on the Action of the Gaveruas 
of the § ‘St teoeate ae coved, and under consideration, 
Works recently published by omens Fis: Rees, Orme, and Brown, 
ondon. 
N INTRODUCTION to MINERALOGY, comprising thie 
Natural History and Characters of Minerals, ard a Description 
of Rocks, both simple and, aggregated. With a new Tabular Arrange- 
ment of Earthy Minerals. On a Plan designed to facititate’ the practical’ - 
Knowledge of that Class of Substances. 'T’o which is prefixed a Series of- 
Conversations explaining the. Principtes of the Sciexce and the anes 
_ of Crystallography, ‘ 
By ROBERT BAKEWFLL, ~ 
Author of An ides ction to Grotacy, is one vol. 8yo, with Plates, ; 
2, CONVERSATIONS on NATURAL PHILOSOPHY, in which 
the Elements of that Science are familiarlyexplained, and adapted to the 
Comprehension of Young Pupils. : 
By the Author of * ConversarTions oF Cremistry,” and “ Conversa- 
rions on Potiricat CEconomy.” Ini2me, Price 10s. 6d. Boards. i 
lustrated with 22 Engravings by Lowsy. 
3. A CRITICAL EXAMINATION of the First Principles of GEO. 
LOGNs ; in a Series of Essays. 
By G. B. GREENOUGH, 
President of the Geological Society, F.R.S, F.L. & ? 
In 8vo. Price 9s. Pages: 
Nig 
This Day is viblished: Price 5s. in Boards, 4 
N ELUCIDATION and EXTENSION of the HARRING- 
TONIAN SYSTEM of CHEMISTRY, explaining all the rine 
nomena without me single Anomaly. . 
ROBERT HARRINGTON, MD. 8 
Author of “ Paik eit Pranetary Lire,’’ from which all the newest ina 
oy" Nautical Tables have been taken, 
Carlisle: Printe by C. Thurnham ; Sold by Sherwood, Necly, and 
‘Jones, London, ys 
Dr. H. anxious to promote Discussion and Examination of his System, 
has lodged 1001./in the Bank of Messrs. Stephenson, Rimington, aud Co, 
‘ Bankers, Lombard-street, London, as a Premium, for a complete, sae an 
full Refutation of it. i: 
THE AMERICAN JOURNAL OF SCIENCE, 
This Day are published, Parts I, to IIE, Price 4s. 6d.-each, 
HE AMERICAN JOURNAL of SCIENCE, more especially ) 
Minerarocy, Geouocy, and the other Branches Ede 
History, including also AcricuttrurE, &c. &c. &c. 
Conducted by BENJAMIN SILLIMAN, M.D. 
Professor of Chemistry, Mineralogy, &c. 
Printed in New-York, for James Eastbourn and Co. ; ; and in Lone 
for John Miller, Burlington Arcade, Pi iccadilly. em 
