[1] Patent No. 3125 (1876).
[2] Patent No. 8271 (1891).
[3] Patents No. 8999 (1887); No. 14,709 (1888); No. 22,531 (1891).
[4] Patent No. 18,719 (1888).
[5] Patents No. 15,598 (1893) and 23,712 (1893); also Beaman and
Deas Sludge Furnace, Patent No. 13,029 (1894).
[6] _Compte Rendu des Travaux de la Société des Ingénieurs Civils de
France_, folio 775 (June 1897).
[7] Patent No. 15,482 (1885).
[8] Patents No. 1955 (1867) and No. 378 (1879).
[9] Patent No. 4896 (1891).
[10] Patent No. 20,207 (1892).
[11] Patents No. 18,398 (1892) and No. 12,990 (1892).