117 



Traak, John B.,cont f d 



758. 18 c Report on the Geology of Northern and Southern 



California ..... Assembly Doc., no. 14, seas. of 

 1850, 68 pp. ,18 v*$ 

 Trowbridge, Arthur C. 



759. 1911 a The Terrestrial Deposits of Owens Valley, Cali- 



fornia. Jour. Geol., vol. 19,00.8, pp.706- 747, 



1 pl,(ap), 24 figs., 1911. 

 Truesdell, UfauB. 



760. 1909 a Ray Copper District, Arizona. Min.and 8cien~ 



tifia ?reaa, vol.98, pp. 794*797, 3 figs., 

 June 5, 1909. 

 Tyeon, Philip f. 



761. 1850,1851 a Geology and Industrial Resources of California: 



to which is added, Th Official Reports of 

 Liouts.falbot, Ord, Derby, and Williamson, 

 of their Explorations in California and Oregon; 

 and also of their Kxaminationii of Routes for 

 Railroad Communication Eastward from those 

 Countries. U.S.31t Congr.,lst sees., Sen. Be. 



Doo,ao.i7, 137-^37 pp.(Tyon,pp.3-74 -^37), 



'Vf'^'. i,'' i. ' 



9 pls.(aaps), 71850; Baltimore, Ifo.Minifie 



& Co,xjtxic,lS7,3? pp., IS pls.(iaapa), with 

 addition of an introduction by Tyson, 1851. 



