Download Any Book A Treatise of Mathematical Instruments, including
most of the instruments employed in Drawing; for assisting the vision;
in Surveying and Levelling, in practical Astronomy and for measuring
the Angles of Crystals
Download Any Book A Treatise of Mathematical Instruments, including
most of the instruments employed in Drawing; for assisting the vision;
in Surveying and Levelling, in practical Astronomy and for measuring
the Angles of Crystals