Vi CONTENTS. 



CaKMicAi. Composition of thb Salton Sua, etc. — Continued. p,^ 



Sulphate radicle 37 



Sodium, potassium, and lithium 37 



Copper 37 



Phosphate radicle 38 



Carbonate and bicarbonate radicles and free carbon dioxide 38 



Chlorine 38 



Bromine, iodine, arsenate, and borate radicles 38 



Nitrate and nitrite radicles 38 



Oxygen consumed 38 



Total solids 39 



Analytical results 39 



Discussion of results 40 



Variation in concentration of the lake at diflferent points in 1911 43 



Composition of the salts leached out from the bottom of the Salton Sea 43 



Vabiations in Composition and Concentration of Wateb of Salton Sea 1912 and 1913. By A. E. 



Vinson 47-48 



Behavior of Certain Micko-oboanisms in Brine. By George James Peirce 49-70 



Location 49 



Climatology 60 



literature 62 



Description 63 



Records 54 



Cultures 62 



Bacteria 66 



Analyses. 67 



Summary and conclusions 68 



The Action of Salton Sea Water on Vegetable Tissues. By Melvin A. Bbannon 71-78 



Anatomical studies of the specimens submerged one to five years 73 



Decorticating processes in specimens of fresh wood immersed in Salton Sea water 76 



Summary 78 



The Tufa Deposits of the Salton Sink. By J. Claude Jones 79-84 



The present tufa deposits 79 



The tufas of Blake Sea 81 



Origin of the tufas 82 



Plant Ecology and Flobistics of Salton Sink. By S. B. Pabish 85-114 



Territorial limitations 85 



Botanical history of the Sink 85 



Zonal position of the Flora of the Sink 86 



Factors determining the distribution of the Sink Flora 87 



Water sources of the Sink 88 



Soils of the Salton Sink 89 



Derivation of the Sink Flora 89 



Distribution of the Sink Flora 90 



Hydrophytic formation 90 



Heliophytic formation 90 



Springs associations 90 



Mortmere 90 



Dos Palmas 91 



Agua Dulce and Fig-tree John Springs 91 



Scirpus-Typha association of Alamo and New Rivers 91 



Endophytic formation 92 



Mecca-Indio Chenopodaceous associations 92 



Atripliceta of the Indio-Mecca flats 93 



Suffideta and spirostacheta of the Indio-Mecca area 93 



Halophytic associations of Imperial Valley 94 



Se8uvium-Spiroetach3rB associations 94 



Halophytic associations of the river bottoms 96 



Sesuvium-Phragmite* association of Salt Slough 96 



