LIST OF ILLUSTRATIONS. VII 



LIST OF ILLUSTRATIONS. 



Plate I. Facing page 



Vivaria and shelters for acclimatization cultures of beetles and plants at 



Desert Laboratory S6 



Terrace with marginal dune, tide-pool, and caving bank, near Travertine 



Point, Salton Sea, February, 1908 56 



Plate 2. 



Map showing distribution of Cereus giganteus on the Tumamoc Hill and 



vicinity 60 



Plate 3- 



A. Bchinocactus wisliseni and Ibervillea sonorce suspended in air to test 



endurance and rate of water-loss 64 



B. Parasitism of Cissus digitata on Optintia sp 64 



Plate 4. 



Sketch map showing route of expedition from Desert Laboratory to Pinacate 



Mountains and the Gulf of California 70 



Plate 5- 



A. The new veranda at Tortugas, 1908 118 



B. Cages for beetles for Dr. Tower's experiments 118 



Plate 6. 



The Sim, showing sun-spot vortices rotating in opposite directions 150 



Plate 7. 



Steel building and dome for 6o-inch reflector 154 



Plate 8. 



Plans of the Nutrition Laboratory 157-158 



Plate 9 (printed as plate 8). 



The Nutrition Laboratory at Boston, Massachusetts 158 



Plate 10. 



The Carnegie 162 



Plate ii. 



Cruises of the magnetic survey yacht Galilee, from August I, 1905, to June 



I, 1908 168 



Plate 12. 



General view of the American excavations at Corinth 176 



