Blake, IB. Phipps, cont'd 



44. 71855 b Preliminary Geological Report. Report of a 



Reconnaissance and Surveys, on partial routed 

 in California, Connected with the Surveys 

 for Ascertaining- the Moat Practicable Rail- 

 road Route froEfthe Mississippi River to the 

 Pacific Ocean, under Command of Lieut. B.S. 

 Williamson in 1853*1854. Published as a 

 separate only, of Bouse Ex.Boc.so.lB9, 33rd 

 Congr.,lst.s38.,8Q pp. , t&ily, ?1885. 



Williamson's Report was not published with 

 the other parts of H.fx.Boc.&o.l39, in vol.18, 

 pt.3 of House Executive Documents, although 

 Williamson's and Blake's reports are listed 

 in Table of Contents of vol.18 as "Pt.x* of 

 Voi.iii* of House Pacific Railroad Reports; 

 this vol.iii was never issued, and Pacific 

 Railroad Reports, Pta.vii, ix, x, which were 

 to constitute it, appear subsequently in 

 augmented form in Senate doc. 



the date 1854 appearing in various bibli- 

 ographies for Blake's Preliminary Report is 

 an error; the date is probably 1855, but not 

 earlier* 



45. 1856 c Observations on the Extent of the Gold Region 



of California sad Oregon, with Sot ices of 

 Mineral Localities in California and of Some 

 Remarkable ^peciaena of Crystalline Gold. 

 The Amer. Jour. Sci. and Arts (0), vol. 30, 

 pp. 78-85 (76), 1855. 



46. 18$5 t 18S6 d Oa the Grooving and Polishing of Hard Rocks and 



Minerals by Dry Sand. The A.T sr. Sour. ?ci. and 

 Arts (3), vol. 30, pp. 178-181, 1855; Ptoc.Amer. 

 Aaaoc.Adv.Sci. ,Tol.9, pp 2 17-230, (1855) 1858. 

 See brief notice in "Preliminary Geological 

 Report, Bouse Ex. Do c. , no. 13 9, p. 37, 185 5. 



