تفاوت بین افقی و عمودی آسیاب دیسک
MICROSCOPY. Anderson's " Panoramic Arrangement for the . The frame is so arrangcd that the disc may be used in the vertical or . stratiou, or it may be turned, levellcd, and thus used in the horizontal position bg mill convince the most sceptical of the great illuminating powcr of the . between the eye and a gas-biirner, near tlie sourcc of light the stud is ..