170 ‘iscellanies. 
“The great number of insects, which it is.in my power to send to 
your country, affording me the assurance that I can satisfy several 
correspondents, induces mie 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.—Spodumene, in 
coarse grained granite, with beryls, near the celebrated locality of the 
tourmalines, Chesterfield, (Mass.) The crystals are very large, ma- 
ny of them having a delicate apple green color. Red ovide of tila- 
nium, in fine crystals, near the soap-stone quarry, Cummington, Mass. 
33. Trap, and rocks altered by it.—Professor Leonhard, of He 
delberg, Germany, in a letter to the editor, dated May 22, 1830, te 
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 T@ 
spects: I have also gone over Auvergne and Velay, and in all these 
places I haye made a rich collection of a great diversity of rocks, 
which I have seen in contact with 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 obsel- 
vations, Prof. Leonhard’s work will be highly acceptable to geologists: 
34. Sir Humphrey Davy’s Consolations in travel.—Throughott 
the whole of this interesting volume, we observe traces of the most 
genuine unaffected piety, and the most complete proofs, that the au- 
thor had studied, in his latter days at least, the peculiar doctrines 
ew 
* In two vols. 8vo. with numerous sections and maps: it may be expected during 
the present year. Prof. Jameson, Edin. Jour. Dee. 1839. 
