VI CONTENTS. 



Chemical Composition of the Salton Sea, etc. — Continued. p age 



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 different points in 1911 43 



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



Variations in Composition and Concentration of Water op Salton Sea 1912 and 1913. By A. E. 



Vinson : 47-48 



Behavior op Certain Micro-organisms in Brine. Bt George James Peirce 49-70 



Location 49 



Climatology 50 



Literature 52 



Description 53 



Records 54 



Cultures 62 



Bacteria 66 



Analyses 67 



Summary and conclusions 68 



The Action op Salton Sea Water on Vegetable Tissues. Bt Melvin A. Brannon 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 75 



Summary yg 



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



The present tufa deposits yg 



The tufas of Blake Sea 01 



Origin of the tufas 00 



Plant Ecology and Ploristics op Salton Sink. By S. B. Parish 85-114 



Territorial limitations oc 



Botanical history of the Sink oc 



Zonal position of the Flora of the Sink sfi 



Factors determining the distribution of the Sink Flora 07 



Water sources of the Sink RS 



Soils of the Salton Sink SQ 



Derivation of the Sink Flora SQ 



Distribution of the Sink Flora qn 



Hydrophytic formation Qn 



Heliophytic formation Qn 



Springs associations 



Mortmere 



Dos Palmas 



Agua Dulce and Fig-tree John Springs 01 



Scirpus-Typha association of Alamo and New Rivers 91 



Halophytic formation ^ 



Mecca-Indio Chenopodaceous associations QO 



Atripliceta of the Indio-Mecca flats ' . ' q ^ 



Susedeta and spirostacheta of the Indio-Mecca area '."'.' .......... . 93 



Halophytic associations of Imperial Valley 



Sesuvium-Spirostachys associations 



Halophytic associations of the river bottoms ] ' " „- 



Sesuvium-Phragmites association of Salt Slough o fi 



