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99

where currents very weak??— too great an abundance of matter would have same effect as too coarse.

Read Kylau on granite Edinburgh Philosophical Journal

Rapport or D' orbigny's Voyage good section of Rio Negro beds. — — refers to species non decrite de petites corbules analogue living in mouth of Plata. p. 26. Geolog of Arica.

[177v]

100

Schist Schmidtmeyer travels into Chile p 29. gold is not sought for in Chile in beds of river, but in shelving successive banks above 30 ft or so above bed of river formed of rounded pebbles — it is clear gold occurs in submarine alluvium, or sublittoral formations.

p. 150. at Portezuelo, extremity of mountains of Cordova project on plain, like re a reef on a sea beach — p. 151 first discovered very small bits of red granite between 40 & 50 from Portezuelo.