Agriculture--Louisiana--St. John the Baptist Parish--Photographs.; Cotton--Research--Louisiana--St. John the Baptist Parish--Photographs.; Evergreen Plantation (St. John the Baptist Parish, La.)--Photographs.; Plantations--Louisiana--St. John the...
Agriculture--Louisiana--St. John the Baptist Parish--Photographs.; Cotton--Research--Louisiana--St. John the Baptist Parish--Photographs.; Evergreen Plantation (St. John the Baptist Parish, La.)--Photographs.; Plantations--Louisiana--St. John the...
Monarch Dust Gun--Photographs.; Agriculture--Louisiana--Madison Parish--Photographs.; McGehee, T. F.; Lead arsenate.; Aerial spraying and dusting in agriculture--Louisiana--Madison Parish--Photographs.; Agricultural machinery--Louisiana--Madison...
Side view of Monarch dust guns used in lead arsenate tests with T. F. McGehee.
Monarch Dust Gun--Photographs.; Agriculture--Louisiana--Madison Parish--Photographs.; McGehee, T. F.; Lead arsenate.; Aerial spraying and dusting in agriculture--Louisiana--Madison Parish--Photographs.; Agricultural machinery--Louisiana--Madison...
Side view of Monarch dust guns used in lead arsenate tests with T. F. McGehee.
Agriculture--Louisiana--West Feliciana Parish--Photographs.; Oak Grove Plantation (West Feliciana Parish, La.); Plants--Effect of poisons on--Photographs.; Plantations--Louisiana--West Feliciana Parish--Photographs.
Center of calcium arsenate poisoned plat showing condition of cotton.
Agriculture--Louisiana--Madison Parish--Photographs.; Aerial spraying and dusting in agriculture--Louisiana--Madison Parish--Photographs.; Field crops--Louisiana--Madison Parish--Photographs.
Test of dust cloud formed by granular calcium arsenate. Material feeding at rate of 95 lbs. per acre.