1832.] Geological Sketch of Masuri and Landour. 193 



* 



Y x 



m n m — ' 



Z ?i m 



therefore the sum of the numeral co-efficients in the expansion 

 x m + A x"- 1 4. B .r n — * + C x n — 3 -f. Y x + z' is 



1 + m « + »0»- l) „• + m(m-l)^m-2) ^ nm _, f ^ 



1. 2. 1. 2. 3 



But this series is evidently the expansion of (1 + n) m = (numher of 

 terms in each factor) m : therefore the sum of the numeral co-efficients of 

 any power of a polynomial is equal to the number of terms in the 

 polynomial raised to the same power. 



IV. — Geological Sketch of Masuri and Landour in the Himalaya ; 



together with an Abstract of the Thermo metrical Register kept at 



Landour during the year 1831. By F. H. Fisher, Assistant 



Surgeon. 



The characteristic features of the primitive clayslate formation at 

 Landour correspond so completely with those of similar districts in 

 Europe, and tend so decidedly to favour the received geognostical 

 arrangement of mountain rocks, that no one can survey them with- 

 out strong feelings of interest and surprise ; recognising at such remote 

 distances the objects of early research and attention, and confirming 

 as it were the result of former inquiry. 



Viewing this mountain from the Dun, its general aspect at once 

 determines its internal composition ; the gentle acclivity, round-packed 

 summit, and plentiful vegetation, indicating clayslate ; its height, 

 calculating above the level of the sea, is supposed to be about 7000 

 feet, and its length ranging from east to west may perhaps average a 

 mile ; seldom affording a breadth on cleared sites of more than 100 feet. 



Throughout this range, instances of some of the accidental rocks, 

 peculiar to the primitive clayslate formation generally, occur. 



Before describing these intruders, which appear to have thrust 

 themselves perversely across the regularly disposed strata of the 

 clayslate, it may not be foreign to note, as briefly as opportunity has 

 afforded, the rocks which appear in the hilly route from Rajpur 

 to the Landour bazarf, assuming the site of the latter to be 

 somewhat above the acclivity of the mountain. 



+ The convenience of geologists having been considered as little as others in the 

 plan and construction of this route, any attempt at systematic arrangement must 



c c 



