This books describes determination of particle size by Microscopic method and sieving method, determination of critical speeds of Ball mill, Effect of time on rate of crystallization, Steam distillation process, various Filtration process like Effect of viscosity on rate of filtration, Effect of surface area on rate of filtration, Effect of concentration on rate of filtration, Effect of thickness on rate of filtration and various mixing process.

Mme Devi Raman travaille comme professeur associé à la faculté de pharmacie, Bharath Institute of Higher Education and Research, Chennai. Mme S. Keerthiga est étudiante en dernière année de licence en pharmacie au FOP, BIHER, Chennai. M. S. Kalaivanan travaille comme professeur adjoint au FOP, Bharath Institute of Higher Education and Research, Chennai, Inde.