1460. To Raise Spirit of a Given Number Below Proof to Proof Spirit, by the Substitution of High Proof Spirit

1460. To Raise Spirit of a Given Number Below Proof to Proof Spirit, by the Substitution of High Proof Spirit. Multiply the number of gallons by the number which the high proof spirit is above proof, divide the product by a number to be found by adding the given number the spirit is below proof to the number the high spirit is above proof; subtract the quotient from the original number of gallons, and the remainder will show the quantity of low proof spirit to be removed, and its place to be supplied by the addition of high proof spirit.

Suppose you desire to raise a cask of 40 gallons at 5 below proof, to proof, by means of spirit 35 degrees above proof.

It will thus be seen that 5 gallons should be taken from the low proof spirit, and the same quantity of spirit added at 35 above proof, in order to raise it to proof strength.

1461. To Raise Spirit of a Given Number Above Proof to a Still Higher Degree of Strength, by the Addition of High Proof Spirit

1461. To Raise Spirit of a Given Number Above Proof to a Still Higher Degree of Strength, by the Addition of High Proof Spirit. First multiply the number of gallons by a number expressing the difference in degrees of strength between the given proof of the spirit to be raised, and the required degree to which it is to be raised. Divide the product thus ascertained, by a number to be found by subtracting the difference in degrees between the spirit to be raised and the high proof spirit employed to raise it. The quotient will show the number of gallons of a higher proof which must be added.

Suppose you desire to raise a cask of 35 gallons spirit 15 above proof to 20 above proof, by the addition of spirit 30 above proof.