Category: Science - Earth/Agricultural/Farming

Geology

Produced by Heather Clark, Tom Cosmas and the Online Distributed Proofreading Team at http://www.pgdp.net (This book was produced from scanned images of public domain material from the Google Print project.)

Chapters

5. Part 5

63. _River-action._--The water of streams and rivers almost invariably contains in solution one or more chemical compounds, and in this respect does not differ from the water of...

6. Part 6

74. _Coral_ is the calcareous skeleton of certain small soft-bodied gelatinous animals called _actinozoa_. These zoophytes flourish only in clear water, the temperature of which...

4. Part 4

52. True _igneous rocks_ occur either in beds or as irregular amorphous masses. When they occur as beds interstratified with aqueous strata, they are said to be _contemporaneous...

8. Part 8

92. _Proofs of Cosmical Changes of Climate._--From the preceding remarks it will be also apparent that fossils teach us much regarding the climatology of past ages. They tell us...

7. Part 7

83. Mention has already been made of the fact, that the heated matters ejected from volcanoes, or forcibly intruded into cracks, crevices, &c., occasionally _alter_ the rocks wi...

1. Part 1

Produced by Heather Clark, Tom Cosmas and the Online Distributed Proofreading Team at http://www.pgdp.net (This book was produced from scanned images of public domain material f...

2. Part 2

SILICATES.--These are by far the most abundantly occurring minerals. The species are also exceedingly numerous, but we may note here only a few of the more important. They are c...

3. Part 3

36. _Mud-cracks and Rain-prints._--The surfaces of some beds occasionally exhibit markings closely resembling those seen upon a flat sandy beach after the retreat of the tide--h...

9. Part 9

82. What is lava? Describe the general appearance and mode of progression of a stream of lava. What effect is produced upon fragments of rock caught up and inclosed in lava; and...