Dyestuffs, hearings on H. R. 2706, to amend act to increase revenue, approved Sept. 8, 1916, and H. R. 6495, to regulate importation of coal-tar products, to promote establishment of manufacture thereof in United States, and as incident thereto, to amend act of Sept. 8, 1916, to increase revenue; June 18-July 18, 1919.