ABSTRACT OF CONTENTS 
Of the Report of the First Geological District of the 
State of New- York. 
Page, 
1. General considerations, 61 
Mining — eagerness for mineral explorations 62 
Associations of minerals, 62 
Advantages from diffused geological knowledge, 62 
Difficulties to be overcome in accomplishing the survey 
without more assistants or time,.... 63 
IL Reconnaisance of the 1st geological district, 63 
Valuable minerals and rocks abundant, 63 
Building stones along the Hudson, 63 
Flagging stones and slates in the valley of the Hudson, 63 
Marbles, (white, clouded, dark colored, variegated and 
conglomerate,) 63 
Stones for common and hydraulic lime, 64 
Granite and gneiss of the Highlands, 64 
Importance of testing the durability of building stones,. 64 
Clays of the Hudson and of Long-Island, 64 
Number of bricks made, 64 
Lime manufactured along the Hudson, 64 
Iron ore of Highlands abundant 64 
Supposed difficulties in the manufacture, 65 
Coal of the valley of the Hudson, 65 
Mineral springs, 65 
Soils— preliminary remarks,- 66 
*' result from rocks, 66 
characters of, from particular classes of rocks, .... 66 
" variations of, due to mechanical and chemical cau- 
ses, 66 
'* texture dependant on, 66 
effect of substrata on soils, 66 
Drainage effected by a knowledge of a geological 
fact, 67 
Mode of changing bad to good soils, 67 
Stones an advantage on light soils, 67 
Chemical composition of soils, = 67 
