The gurgling effect used on george harrison's guitar in "lucy in the sky with diamonds," which became a signature harrison/beatles sound, was achieved by using

George Harrison played an Indian instrument known as a tamboura on the final take when the Beatles recorded Lucy in the Sky with Diamonds. The song was a mix of different takes mixed together.

b) the confederacy had to pay all union war expenses.

collect the tariff by force if necessary

use the military to enforce a federal law

b and c