BIBLIOGRAPHY 



THE PUBLICATIONS OF ISAAC LEA. LL. D. 



1818. Lea, Isaac. An account of the Minerals at present known to exist in the 

 vicinity of Philadelphia. <^ Journ. Acad. Nat. Sci. Phila., i, Ist series, 

 pp. 46-2-482. 



Printed under date of December, 1818. 



2. 



1822. Lea, Isaac. Notice of a singular impression in sand-stone. <C^Amer. Journ. Sci. 

 and Arts, v, 1822, j). 155. 



Letter to Prof. Silliman, dated Pebruary 24, 1822, about some "reliquia" found about a 

 quarter of a mile above Pittsburgh, and on the same side of the Monongahela. Nature of 

 impression unknown. 



3. 



1825. Lea, Isaac. Sketch of the History of Mineralogy. <^ Amer. Med. Journ., 



Nov., 1823, pp.270 . 



Sabin, in Ms Bibliotheca Americana, mentions a separate of this. See No. 39494. 



1825. Lea, Isaac. On Hybernation. <:^ Amer. Journ. Sci. and Arts, ix, 1825 (June), 

 pp. 75-83. Also in Froriep, Notizen, xxxix, 1834, col. 161-1G8. 



1825 Lea, Isaac. On Earthquakes — their causes and effects. <[ Amer. Journ, Sci. 



and Arts, ix, 1825, pp. 209-215. 



6. 



182G. Lea, Isaac. On the North-West Passage. <[ Amer. Journ. Sci. and Arts, x, 

 1826 (February), pp. 138-145. 



1826. Lea, Isaac. Notice of two halos with parhelia. <^ Amer. Journ. Sci. and Arta, 

 X, 1826, pp. 368, 369. One plate. 



8. 



1826, Lea, Isaac. On the pleasure and advantage of studying Natural History. 

 <^ Amer. Journ. Sci. and Arts, xi, 1826, pp. 218-224. , • 



1827. Lea, Isaac. Description of Six New Species of the Genus Unio, embracing 

 the Anatomy of the Oviduct of one of them, together with some Anatomical 

 Observations on the Genus. <^ Trans. Amer. Philos. Soc, iii. New series, pp. 

 259-273, pis. iii-vi. 



Read before the American Philosophical Society November 2, 1827. Acknowledged April 

 25, 1828, by correspondent in Cincinnati wlio had received impressions of the plates Decern- 



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