Madure^s Letters, 157 



in the history of the sciences. The society has just received 

 from the Section des Indes, a package of beautiful plants, 

 some of which were before unknown. On the same day 

 and hour, the three foreign sections de Pfnde situated at the 

 Island of Maurice, of French Guiana and of Senegal will 

 have made the same meteorological observations, which they 

 will not fail to insert in the proces-verbal, destined for the 

 parent society, in order that philosophers may compare them 

 with each other. In those very distant regions, this interest- 

 ing feast will have been celebrated, which, renewed every 

 year, and in such different places, cannot fail to spread, and 

 inculcate more and more a taste for that noble science which 

 is so intimately connected with our wants, and which deserves 

 to be much more extensively cuhivated and encouraged than 

 it has generally been. 



Art. XXVI. — Extracts from Utters, addressed to the Editor, 

 by William Macluke, Esq. President of the American 

 Geological Society. 



MOSAIC GEOLOGY. 



Dublin, June 30th, 1824. 

 Dear Sir, 



"Fatigued and tired with the injustice, cruelty, 

 oppression, and folly of despotism, I left Alicant on the day 

 your two letters of January 23, and March 3, arrived. 



Your division* of the Mosaical Geology applies better to 

 the transition and older secondary than any thing I have yet 

 seen, and is, perhaps, as good a solution of what is completely 

 out of our reach, as any other. 



The fact that the transition is at a constant dip, may be 

 owing to its being disposed on the primitive, concerning 

 which we can as yet scarce conjecture any thing, and may 



* That is, by epochs, corresponding with the order of time, described in the 

 Genesis, and with the succession of geological formations, which we actually 

 find, in the structure of the globe. This was briefly sketched in the letter 

 alluded to by Mr, Maclure. 



