480. Map of laccolitic mountains 441 481. Ideal sections of laccolite and bysmalite 442 482. The gabled façade largely developed in desert landscapes 443 483. Balloon view of the Mythen in Switzerland 444 484. The battlement type of erosion mountain 445 485. Symmetrically formed low islands repeated in ranks upon Temagami Lake, Ontario 445 486. Forms of crystals of a number of minerals 454 487. Forms of crystals of a number of minerals 457 488. A student’s contour map 469 489. Models to represent outcrops of rock 472 490. Special laboratory table set with a problem in geological mapping which is solved in Figs. 47 and 48 472 491. Three field maps to be used as suggestions in arranging laboratory table for problems in the preparation of areal geological maps 473 492. Sketch map of Western Scotland and the Inner Hebrides to show location of some points of special geological interest 481 493. Outline map of a geological pilgrimage across the continent of Europe 483 EXPLANATORY LIST OF ABBREVIATIONS FOR JOURNAL NAMES IN READING REFERENCES Am. Geol.: American Geologist. Am. Jour. Sci.: American Journal of Science, New Haven. Ann. de Géogr.: Annales de Géographie, Paris. Ann. Rept. Geol. and Geogr. Surv. Ter.: Annual Report of the Geological and Geographical Survey of the Territories (Hayden), Washington. Ann. Rept. Geol. and Nat. Hist. Surv. Minn.: Annual Report of the Geological and Natural History Survey of Minnesota, Minneapolis. Ann. Rept. Mich. Geol. Surv.: Annual Report of the Michigan Geological Survey, Lansing. Ann. Rept. U. S. Geol. Surv.: Annual Report of the United States Geological Survey, Washington. Bull. Am. Geogr. Soc.: Bulletin of the American Geographical Society, New York. Bull. Earthq. Inv. Com. Japan: Bulletin of the Earthquake Investigation Committee of Japan, Tokyo. Bull. Geogr. Soc. Philadelphia: Bulletin of the Geographical Society of Philadelphia. Bull. Geol. Soc. Am.: Bulletin of the Geological Society of America. Bull. Mus. Comp. Zoöl.: Bulletin of the Museum of Comparative Zoölogy, Harvard College, Cambridge. Bull. N. Y. State Mus.: Bulletin of the New York State Museum, Albany. Bull. Soc. Belge d’Astronomie: Bulletin de la Société Belge d’Astronomie, Brussels. Bull. Soc. Belge Géol.: Bulletin de la Société Belge de Géologie, Brussels. Bull. Soc. Sc. Nat. Neuchâtel: Bulletin de la Société des Sciences Naturelles de Neuchâtel. Bull. Univ. Calif. Dept. Geol.: Bulletin of the University of California, Department of Geology, Berkeley.