132 Queries by the Geologists of the Survey of New York. 
rection of the dip; whether dislocations or faults, dykes, veins, &c. 
traverse the strata, and the direction and inclination of these dislo- 
cations, veins, dykes, &c. Sketches should generally be made to 
illustrate the thickness and relative position of strata, particularly if 
the strata be contorted. 
5. Note if any traces of organic existence be observable in any 
of the materials mentioned, whether animal or vegetable, either as 
impressions, casts, or petrifactions; whether imbedded or loose in 
these materials. 
6. The excavations in mining, quarrying, cutting canals, rail- 
roads, &c. offer particular facilities for observing the phenomena of 
stratification, of the superposition of rocks, &c. 
7. In boring for coal, salt springs, &c. it is hoped that specimens 
of the rock, clay and sand, of every foot in depth passed through 
will be preserved, and accurate minutes made in writing on the spot. 
8. In deep wells, mines and salt springs, the temperature of the 
water should be measured as it issues from the strata. 
9. ‘The temperature of copious springs should be measured, noting 
if it be different at different seasons of year. 
10. In mines, is there a local variation of the compass, and are 
there evidences of the passage of electrical currents ? 
11. What is the mean temperature of the bottom of the mine? 
and of the rocks at the ends of the levels, at such a depth as to be 
beyond the influence of the heat of the air of the mine? 
12. Specimens to illustrate the various kinds of minerals, rocks, 
clays, marls, peats, &c., should generally be about two by three, or 
three by four inches, and one to two inches thick, of a rectangular 
form, and free from hammer marks and weathering. 
13. Fossils, or rock specimens containing foals must be taken 
of such a size as may be necessary to illustrate to the best advan- 
tage ; still, where fossils are imbedded in stone, much taste may be 
displayed in getting them out with a good shape and free from ham- 
mer marks. 
14. The occurrence of bones, tusks, teeth, shells, &c. where 
wells, cellars, canals, roads, &c. have caused excavations to be made, 
should be particularly noted. 
15. Every specimen from the same stratum at any one locality 
should be marked with a similar mark, and each specimen to cor- 
respond in its mark with that of the stratum from which it was ta- 
ken, on the sketch or section. 
