FREE BOOKS

Author's List




PREV.   NEXT  
|<   136   137   138   139   140   141   142   143   144   145   146   147   148   149   150   151   152   153   154   155   156   157   158   159   160  
161   162   163   164   165   166   167   168   169   170   171   172   173   174   >>  
y down the slope a distinct valley. On the N.E., where the _glacis_ runs down to the level of the surrounding plain, there is a large crateriform object with a broken N. border, and a small crater opposite the opening. A long coarse valley runs from this latter object in a N.E. direction to the region W. of Bohnenberger. Santbech contains a prominent central peak. BIOT.--A brilliant little ring-plain, scarcely more than 7 miles in diameter, standing in an isolated position in the Mare Foecunditatis N.E. of Wrottesley. There is a number of bright streaks in its neighbourhood; and a few miles E. of it, in the hilly region W. of Santbech, another conspicuous crater of about the same size. BORDA.--A ring-plain about 25 miles in diameter, S.S.W. of Santbech, with a rampart low on the N. and S., but elsewhere of considerable height, and a very conspicuous central mountain. A wide deep valley flanked by lofty mountains extends from the N. wall for many miles towards the N.W. It is an especially noteworthy object when the W. wall of Santbech is on the evening terminator, as its somewhat winding course, indicated by the bright summit-ridges of the bordering mountains, can be followed some hours before either the interior of the valley or the region between it and Santbech are in sunlight. Among the mountains W. of Borda there is a peak more than 11,000 feet in height. SNELLIUS.--A very fine ring-plain, 50 miles in diameter, S.E. of Petavius, with terraced walls, considerably broken on the S.E. by craters, &c. It rises on the E. nearly 7000 feet above a dark floor, which contains a central mountain. N.E. of Snellius is a smaller ring- plain (Snellius _a_), and due E. a curious rough plateau, bordered on the N. and S. by a number of small craters. STEVINUS.--A somewhat larger ring-plain, S. of Snellius, with a border rising on the S. to more than 11,000 feet above a dark interior, which includes a bright central mountain. REICHENBACH.--A very abnormally-shaped ring-plain, about 30 miles in diameter, with a rampart nearly 12,000 feet high. The border is broken on the W., S., and E. by craters and depressions, and on the N. is flanked by two overlapping ring-plains, _a_ and _b_. On the S.W. lies a magnificent serpentine valley, fully 100 miles in length and about 12 miles in breadth at the N. end, but gradually diminishing as it runs southwards, till it reaches a depression N. of Rheita, where it terminates: here is scarce
PREV.   NEXT  
|<   136   137   138   139   140   141   142   143   144   145   146   147   148   149   150   151   152   153   154   155   156   157   158   159   160  
161   162   163   164   165   166   167   168   169   170   171   172   173   174   >>  



Top keywords:

Santbech

 
valley
 

central

 

diameter

 

mountains

 

Snellius

 
mountain
 
region
 

bright

 

border


object

 

craters

 

broken

 

rampart

 

conspicuous

 
number
 

interior

 
flanked
 

height

 

crater


sunlight

 

reaches

 

depression

 
southwards
 

diminishing

 

scarce

 

Petavius

 

SNELLIUS

 
terminates
 

terraced


Rheita

 

considerably

 
gradually
 

smaller

 

shaped

 

abnormally

 
REICHENBACH
 
serpentine
 

magnificent

 

overlapping


depressions
 

includes

 

breadth

 

curious

 

plateau

 

length

 

rising

 
larger
 

STEVINUS

 
bordered