Green and blue carbonate of copper, was also observed in limited quantity, in small rounded masses at one of the lead diggings near Mineral Point, Iowa county.

38. Chromate of iron. Presque Isle, Lake Superior.

39. Sulphuret of lead. Lead mines of Iowa county, Michigan Territory.

40. Earthy carbonate of lead. Brigham’s mine, Iowa county, Mich. Ter. Also, in small masses, of a yellowish white, dirty color, and great comparative weight, at several of the lead mines (diggings) in the more westerly and southern parts of the county.


3. Localities of plants collected in the north-western
expeditions of 1831 and 1832.

BY DOUGLASS HOUGHTON, M. D.
SURGEON TO THE EXPEDITIONS.


The localities of the following plants are transcribed from a catalogue kept during the progress of the expeditions, and embrace many plants common to our country, which were collected barely for the purpose of comparison. A more detailed account will be published at some future day.