Note 16 — Chapter II · The Petrographical Microscope.[16]
Reading edition
For a short historical sketch of the use of the microscope in connection with Petrology, see G. H. William’s pamphlet, Modern Petrography (Monographs of Education), Boston, 1886. For detail description and adjustments, see Methods of Petrographic-Microscopic Research, F. E. Wright, 1911, pp. 11, 61.