This chapter shall not apply to the production or manufacture of steam, gas or electricity for heat, light or power or to the production of the usual farm products for home consumption or market purposes.

14 Del. Laws, c. 24, § ?1; 27 Del. Laws, c. 29; Code 1915, §§ ?196, 226A; 40 Del. Laws, c. 25, § ?1; 40 Del. Laws, c. 30, § ?1; Code 1935, § ?171; 30 Del. C. 1953, § ?2703; 57 Del. Laws, c. 136, § ?15; 75 Del. Laws, c. 199, § ?36;