170 Mtscellnnies, 



" The great number of msects, wliich it is in my power to send to 

 your country, affording me the assurance that I can satisfy several 

 correspondents, induces me to request that you would make some 

 overtures in my favor, so as to bring me into connection with such 

 entomologists of your acquaintance, as may be desirous of making 

 exchanges. I recommend this measure more particularly with re- 

 spect to the naturalists, that live in countries, that you may not be 

 able to visit. You may reckon beforehand on all my efforts to tes- 

 tify my gratitude, which will always be something more than a mere 

 equivalent for the pains that you and your friends may take in my 

 behalf." 



32. Localities of Minerals, by Jacob Porter. — Spodtimene, in 

 coarse grained granite, with beryls, near the celebrated locality of the 

 tourmalines, Chestei-field, (Mass.) The crystals are very large, ma- 

 ny of them having a delicate apple green color. Hed oxide of tita- 

 nium, in fine crystals, near the soap-stone quarry, Cumminglon, Mass. 



33. Trap, and rochs altered by it. — Professor Leonhard, of Hei- 

 delberg, Germany, in a letter to the editor, dated May 22, 1830, re- 

 marks, that he had been much interested in the account contained in 

 the 17th volume of this Journal, of the changes which the trap had 

 produced upon the sand-stone in the vicinity of Hartford ; and he is 

 disposed to call the sand-stone the variegated. He adds, " I have 

 been occupied several years in similar researches, and have visited 

 most of the mountains of Germany that are interesting in these re- 

 spects : I have also gone over Auvergne and Velay, and in all these 

 places I have made a rich collection of a great diversity of rocks, 

 which I have seen in contact v^'ith basalt or with dolerite, and which 

 prove the different degrees of alteration produced by the heat. I 

 intend to publish — perhaps the next year- — a work upon this sub- 

 ject."* We will only add, that after such extended and varied obser- 

 vations. Prof. Leonhard's work will be highly acceptable to geologists. 



34. Sir Humphrey Davy^s Consolations in travel. — Throughout 

 the whole of this interesting volume, we observe traces of the most 

 genuine unaffected piety, and the most com.plete proofs, that the au- 

 thor had studied, in his latter days at least, the peculiar doctrines of 



* In two vols. 8vo. Vv^ith numerous sections and maps : it may be expected during 

 the present year. — Prof, Jatneson, Edin. Jour. Dec. ISSO, 



