14 
Lignite from the mouth of Magothy River, Maryland,— Prom 
Francis Markoe,jr. 
History of Tripoli; its present condition, &c. By Robert Green- 
how.— From the, Author . 
“ Synopsis of the Organic Remains of the Cretaceous Group of 
the United States/’ and three Scientific pamphlets. By S. 
G. Morton, M. D.— From the Author. 
Catalogue of the Library of the Academy of Natural Sciences. 
Philadelphia.— From the Academy. 
Twenty-four Roman, Moorish, and Arabian Coins, found near 
Velez Malaga. Spain.— From G. Read Esq ., U. S. Consul 
at Malaga. 
Pamphlets on Scientific Subjects, by the Chevalier A. B. de 
Mascarenhas, Portuguese Consul, &c. Bristol, England.—■ 
From the Author. 
A collection of Trap Rocks, from Virginiai —From H. C. 
Williams. 
Specimens of the Red Sandstone of Connecticut, containing 
impressions of the feet of Birds, &c. &c. : the Ornithichno- 
lites, &c. &c., of Professor Hitchcock.— From Col. Talcottj 
U. S. Army. 
The following letters were read. From Isaac Weld, Esq., 
of Dublin, honorary Secretary of the Royal Dublin Society; 
and from Lieut. Wm. F. Maury, U. States Navy : 
Royal Dublin Society, 30th Oct. 1840. 
To Francis Markoe, Jr., Esq. Corresponding Secretary , <$*c. 
Sir : Absence from Dublin must be my apology for not having sooner acknow¬ 
ledged your letter of the 22d August last, informing me that I had been elected a 
corresponding member of the National Institution for the Promotion of Science, 
established at Washington. I beg to assure the members that I feel grateful for 
the favorable sentiments they have been pleased to entertain towards me on this 
occasion, and that I esteem it a high honor to belong to the Institution. 
We have in Dublin two institutions for the more immediate promotion of science— 
the Royal Irish Academy and the Royal Dublin Society. I have been a member 
of each for forty years past, but it is of the latter body that I am Honorary Secre¬ 
tary. 
The Academy instituted in 1786 devotes itself to Science, Polite Literature, and 
Antiquities. Original communications are received and read, and those most ap- 
