128 Scientific Intelligence. 
- sagan the volatile ingredients, coke, ash, sulphur, &e., of mirietal 
oals by means of the blowpipe alone. 
16. On ee sleghaer.. —_— the Deposits of Auriferous Drift of 
LI 
accumulations of on eet ‘and i It is evident in Coote 
as in California, that the rivers once ran at a much higher level, even “ 
the tops of the present hills. River-gravel and gold is found here 
200 to 300 feet above the streams. Many of these deposits on the hills 
give evidence of — richness but have never ee worked, owing to 
the distan earth from water and the expense of excavating and 
it to the rivers. Owing also to the difficulty of 7 these 
high places, — water at hand, their value has never been fully 
supplied to them by a canal several miles in length, winding about on 
the sides of the hills, and at one point the water is carried across a valley, 
The gold from these oe oh te stnerie ne het seeatt ol the high 
placers of California, but it is similar in the form of the particles. Black 
sand is very abundant and coarse, and contains zircon, corundum, kyanite, 
garnets and other minerals not yet determin 
7. On Tennessee Geological History ; by. Prof. James M. SarrorD. 
a letter to J. D. Dana, dated Lebanon, Tennessee, March 31st, 
There i is an example of pabentoemaalsli between the Lower and 
lurian in Tennessee which has not attracted the notice it de- 
her ayn hare bo a hd in the Upper Silurian and | 
; seOor 90 mie : 
e Lower jap 
