Sections: 



Astronomy — Dec, 1903, 13; 



1904:. Jan., 30; Feb., 46; 



March, 64; April, 79; May, 



95; Oct., 132; Nov., 147. 



Biology — Dec, 1903, 14; 1904: 



Jan., 31; Feb., 46; April 80; 



May, 96; Oct. 131; Nov. 146. 



Botany — 1904: Oct., 132; Nov., 



148. 

 Geology — Dec, 1903, 14; 1904: 

 Jan., 31; Feb., 46; March, 64; 

 May, 80; April, 106; Oct., 

 132. 

 Trask, Blanche (papers) .. 76, 90, 140 



Trifolium gracilentum 91 



Trifolium palmeri 91, 93 



Trifolium tridentalum 91 



Tripoxylon apicalis, Fox; Its Nest- 

 ing- Habits. By Dr. A. Davidson 25 



Tripoxylon apicalis, Fox 24 



Tripoxylon linyphia • 25 



KJ 



University of Pennsylvania explor- 

 ations 42 



V 



Viola pedunculata 92 



Volcanic areas 43 



Volcanic energy . . 43 



Wampum 154, 155, 156 



Whale, fossil remains 6 



Whitney's Place, Catalina Island. . 



151, 152 

 Williamson, Mrs. M. Burton 



(papers) 38, 60, 149 



Wislizenia refracta, Eng Ill 



VTork of the U. S. Reclamation 

 Service in California. By J. B. 

 Lippincott, Supervising Engi- 

 neer 137 



Xylocopa 86, 87 



Xylocopa barbata. Fabr 87 



Xylocopa californica arizonensis, 



Xylocopa fimbriata, Fabr 87 



Xylocopa orpifex. Smith 87 



Xylocopa rufescens, Smith 86 



Xylocopa varipuncta, Patton . . . 8^6, 87 



Cress 87 



Yates, Dr. Lorenzo G. (papers) . . 



6, 10, 25, 42 

 Yuma Irrigation Project 139 



