The number on top is always one in the harmonic series.............and the number on the bottom becomes key........jumps..........1/9 then there is 1/10.........19 to 110...........double digit......to triple digit.............1/99.......the bottom number is still.....double digit........the next fraction in the h. series.....is 1/100..............so if 199.....is from 1/99............then 1,100 is from 1/100..........a jump......from 199 to 1,100................and i think the key to understanding better the distribution of primes........which follow a basic pattern..........but is erratic inside it....