Page 503 - Applied Pharmacognosy

3. Linear particles of a uniform thickness such as fibers in
Cinnamon and Cassia barks, trichome ribs in Nux vomica;
the length of which can be measured at a definite
magnification and the actual length calculated.

• 4. in case of infestation; the strial puncture is
considered countable particle.

• NB: From the no. of strial puncture per elytron
we can determine the type of insects.

• Elytron is the anterior wing of insect.

We can determine the no. of certain countable particles
per unit weight of a drug