SEC. 3. Until the first day of January, nineteen hundred and nine, the use of the following is authorized :
(a) As a unit of weight, the Spanish avoirdupois ounce of twenty-eight and seventy-rive hundredths grams.
(b) As a unit of weight, the Spanish avoirdupois pound of six-teen ounces—that is, of four hundred and sixty grams.
(c) As a unit of weight, the arroba of twenty-five Spanish avoir-dupois pounds—that is, of eleven thousand five hundred grams.
(d) As a unit of weight, the quintal of one hundred Spanish avoirdupois pounds—that is, of forty-six thousand grams.
(e) As a unit of weight, the picul (or pico) of one hundred and thirty-seven and one-half Spanish avoirdupois pounds—that is, of sixty-three thousand two hundred and fifty grams.
(f) As a unit of weight, the International carat or quilate of two hundred and five milligrams.
(g) Any scale or balance graduated in the above units.
(h) As a unit of capacity, the cavan of seventy-five liters. It is the volume of a cube each side of which is four thousand two hundred and seventeen ten thousandths of a meter.
(i) As a unit of capacity, the ganta of three liters. It is the volume of a cube each side of which is one thousand four hundred and forty-two ten thousandths of a meter.
(j) As a unit of capacity, the chupa of three hundred and seventy-five thousandths of a liter. It is the volume of a cube each side of which is seven hundred and twenty-one ten thousandths of a meter.
(k) As a unit of capacity, the apatan of nine thousand three hundred and seventy-five hundred thousandths of a liter. It is the volume of a cube each side of which is four thousand five hundred and forty-three hundred thousandths of a meter.
(l) As a unit of capacity, the arroba of sixteen liters. It is the volume of a cube each side of which is two thousand five hundred and twenty-one ten thousandths of a meter.
(m) As a unit of length, the Spanish inch of two hundred and thirty-two ten thousandths of a meter.
(n) As a unit of length, the Spanish foot of twelve inches— that is, of two hundred and seventy-nine thousandths of a meter.
(o) As a unit of length, the vara of three Spanish feet—that is, of eight hundred and thirty-six thousandths of a meter.
(p) As a unit of length, the braza of two varas—that is, of one and six hundred and seventy-two thousandths meters.
(q) As a unit of area, the square braza of two and seven hundred and ninety-five thousandths square meters.
(r) As a unit of area, the loan of one hundred square brazas—that is, of two hundred and seventy-nine and five-tenths square meters.
(s) As a unit of area, the balita of one thousand square brazas— that is, of two thousand seven hundred and ninety-five square meters.
(t) As a unit of area, the quatation of ten thousand square brazas—that is, of twenty-seven thousand nine hundred and fifty square meters.
(u) As a unit of area the cavan of three thousand six hundred square brazas—that is, of ten thousand and sixty-two square meters.