Contents of Volume XVI. 



Page 



Studies of Cloud Formations in Havana 



Prof. Simon Sarasola, S.J. 9 



Crepis nana Fred E. Bnrlezv 13 



Collinsia monticola A. Davidson, M.D. 13 



Additions to Los Angeles Flora A. Davidson, M.D. 14 



Mt. Wilson Telescope Prof. W. S. Adams, D.Sc. 19 



Marine Biological Survey Prof. A. B. Ulrcy, A.M. 23 



Mark Twain H. 0. Collins, LL.D 29 



Prehistoric use of Bitumen in Southern California 



Hector AUiot 41 



Payne's New Hybrid Lilac A. Davidson, M.D. 45 



Rhamnus Catalinae .■ A. Davidson, M.D. 47 



White Ants A. Davidson, M.D. 48 



F'remontodendron Mexicanum A. Davidson, M.D. 50 



The Red Hill Pools S. B. Parish 51 



World's Most Powerful Telescope William H. Knight S3 



Transactions 58 



