In this study we investigated the application of mercury porosimetry technique into the determination Reversing Camera Accessory of porosity features in 28 week old hen eggshells.Our results have shown that the majority of the pores have sizes between 1 to 10 mu m in the eggshells studied.By applying mercury porosimetry technique we were able to describe the porosity features better, by determining Keyboards a pore size distribution in the eggshells.Here, we introduce mercury porosimetry technique as a new routine technique applied into the study of eggshells.