Page 505 - Applied Pharmacognosy

• Using the high power objective lens count the no. of

lycopodium spores and the no. of starch granules in ten

fields.

• no. of lycopodium spores = s

• no. of starch granules = n

•1 2

So, the no. of countable particles per unit weight of any
drug equals n x w x 94000

sxm