Street slang for dosage amounts of LSD happens to be arranged in a handy metric format. How terribly forward-thinking.

1 dosage unit (~100 ug) is a hit
10 hits is a strip, or a ten-strip
10 strips is a sheet, or in liquid format a vial
10 sheets is a book
10 books is a bible
1 bible, or 10,000 hits, is the average monthly output of a clandestine LSD lab, of which law enforcement estimates there are less than ten of in operation in all of America.