—, foundling, in Europe, xvii, 393.
Hot blast, in the manufacture of iron, T. Clark, xxxi, 180.
— —, saving by, xxviii, 71.
— springs or baths, see [Springs.]
Hough, H.G., inquiries into the principles of liquid attraction, xvii, 86.f
Houghton, D., geology of Michigan, xxxiv, 190.
—, mining region of Michigan, xli, 183.
Houses, improvements in laying out grounds, arranging and building, &c., E. Lord, xxv, 304.
—, double doors and double windows for, xxv, 294.
—, mode of heating, xxv, 295.