Miscellanies. 183 
MISCELLANIES. 
GEOLOGY. 
1. Outlines of Geology, prepared for the use of the Junior 
Class of Columbia College; by Jas. Renwick, LL. D. Prof. of 
Nat. and Exp. Philos. and Chem.: large 12mo, pa. 96. Printed 
by Henry Ludwig, 1838. 
_ The author divides his subject under, 
I. Physical Geography—which inquires into the form and ex- 
ternal characters of our globe 
II. Geognosy—which examines the nature and relative posi- 
tion of the materials which compose its external crust. 
Ill. Geogeny—which investigates the manner and order in 
which these materials have assumed their present position. 
Physical Geography is treated under the following heads: 
- 1. Of the figure and density of the earth. 
2. Of the temperature of the crust of the earth. 
3. Of the distribution of land and water on the surface of the 
globe. 
4. Of the inequalities of the land. 
..§. Description of the two great continents. 
6. Of rocks and fossils. 
Geognosy.—T he formations are divided as follows: 
Modern formations, under six orders. I. Alluvial. Il. Chem- 
ical. If. Diluvial. IV. Volcanic. 
- Ancient formations are either stratified or not. Stratified for- 
witivne are included under five orders: I. Superior. II. Super- 
medial. III. Medial. IV. Submedial. V. Inferior.—Ancient 
rocks not stratified are included under six orders: I. Granitoid. 
Il. Porphyritic. III. Ophiolitic. IV. Trachytic. V. Trap. VI. 
Volcanic. 
_ Geogeny is not divided, except under paragraphs and pages. 
Of the latter there are 18; of the former, 20. 
_ Physical Geography occupies 25 pages, and 54 paragraphs. 
nosy, 53 pages, and 139 
It will ~ seen that the above ieheme covers the whole sub- 
ject. _ To give even its outlines within the limits of 100 pages, re- 
quires of course great condensation. This has been effected by 
