a burnt offering
This refers to the offerings spoken of in Numbers 15:3.
a tenth of an ephah
"about 2 liters" or "two liters". An ephah is a unit of volume equal to about 22 liters.
one-fourth of a hin
"about 1 liter" or "one liter". A hin is a unit of volume equal to about 3.7 liters.