380 Miscellanies. 



Should you visit New York soon, you would honor me much by 

 calling upon me, and I then could explain myself more fully. May 

 I beg the favor of your sending me that number of the American Jour- 

 nal in Which the description of the telescope will appear. With very 

 many thanks for the trouble I have occasioned you, 



I remain your obedient servant, Leon Lewenberg. 



New York, 28th Feb., 1840. 



8. Interesting Minerals. — The subscriber has recently supplied 

 himself with an additional collection of the interesting minerals of 

 Nova Scotia, formerly discovered by Dr. Jackson and himself, and is 

 desirous of exchanging them for those of other regions, foreign or 

 domestic. The minerals are similar to those found in the trap rocks 

 of other countries, and the specimens have been selected with great 

 care, are of good size, and most of them beautifully crystallized, 

 often uniting in the same mass, several different species.* Those who 

 may wish to exchange for them specimens of an equivalent charac- 

 ter, will please forward to the subscriber a list from which he n;jay 

 make a selection ; his object being to obtain those from localities vftith 

 which his cabinet is not already supplied, without adding much to his 

 stock of duplicates. The minerals comprise most of the species of 

 the genus Kouphone spar of Mobs and Haidinger, besides most of 

 the varieties of rhombohedral and uncleavable quartz, with several 

 interesting ores of iron and copper, crystallizations of carbonate and 

 sulphate of lime, &c. &c. Francis Alger. 



Boston, January 1. 1840. 



9. Observations Meteor ologiques et Magnetiques faites dans Veten- 

 due de V Empire de Russie redigees et publiees auxfrais du Gouverne- 

 ment, par A. T. Kupffer, Mem. Acad. Sci. St. Pet. Tome ler. St. 

 Petersbourg, 1837. 4to. pp. xlvi and 196. — We have been favored by 

 the author with the first volume of this valuable work. It contains, 

 1st. Extracts from the instructions given to the officers of the mines, 

 appointed to make meteorological and magnetical observations in the 

 Russian Empire, and 2d. Series of tables of observations in meteor- 

 ology and in magnetism, made at St. Pstersburgh and at Catherinen- 

 burg, in 1835, 1836. The meteorological observations were taken 

 eight times per diem, and appear to have been made with very great 

 care. 



* For an enumeration of these minerals, the reader is referred to Vols, xiv andxv 

 of this Journal, and to the Memoirs of the American Academy, for 1833, new 

 series. Having recently inspected them in Mr. Alger's cabinet, we can bear tes- 

 timony to their extraordinary beauty and perfection. — Eds. 



