—, —, —, —, J. Locke, xli, 160; xliii, 147.
—, —, —, —, J. Hall, xlii, 51.
—, —, —, —, G. W. Featherstonhaugh's report noticed, xxviii, 379; xxxii, 185.
—, —, —, Michigan, observations on, J. Pierce, x, 304.
—, —, —, —, rocks of, xl, 136.
—, —, —, —, mining region of, D. Houghton, xli, 183.
—, —, —, —, D. Houghton's reports on, noticed, xxxiv, 190; xl, 136.
—, —, —, —, N. W. portion of Lake Huron, J. J. Bigsby, iii, 254.f
—, —, —, —, Fort Winnebago, D. Ruggles, xxx, 1.f
—, —, —, —, Kewenaw Point, C. T. Jackson, xlix, 81.