Number of Cases of Mackerel Canned 1918-1928. In Fish Catch Statistics. California Department of Fish and Game

Bulletin 15 : "cases" is in number of cases of mackerel, where a case is 48 cans (inferred from bulletin 20). However, this table is vague as it doesn't account for the different types of cans (e.g. 1 pound, 1/2 pound, 1/4 pound mackerel). Bulletin 20 has a more detailed breakdown of cases of mackerel "cases" is in number of cases of mackerel, where a case is 48 cans. IMPORTANT: Each county has a different variety of cans but this info is not storied on the csv. In order, they are: San Pedro - 1 pound, 1/2 pound, 1/4 pound, 1/2 pound oval, 1 Oval Fillet (inferred to be 1 pound); San Diego - 1 pound, 1/2 pound, 1/4 pound, 1/2 pound oval; Monterrey - 1 pound, 1/2 pound oval; State Total - 1 pound, 1/2 pound, 1/4 pound, 1/2 pound oval, 1 Oval Fillet (inferred to be 1 pound). Finally, in order to have a more accurate representation of mackerel being canned, the last entries convert the total cans for each year to 1 pound cans. For example, 4068 1/2 pound cans is converted to 2034 1 pound cans and added with other converted can types to give a total. See Bulletin 20 pg. 26 for more information.