Joseph McKenna, Carbon Steel Company v. Lewellyn…
“ It takes from the act a great deal of utility and makes it miss its purpose. Of course it did not contemplate that 'person manufacturing' should use his own hands-it contemplated the use of other aid and instrumentalities, machinery, servants, and general agents; availing thereby of the world's division of labor, but it contemplated also the world's division of occupations, and in this comprehensive way, contemplated that all of the world's efficiency might be availed of, and when availed of for profits, the latter could not thereby escape being taxed. ”
