S T A 



rdr 



6. Spirahy point of contrary flexure in. 



Here the rad. of curvature is either infinite or nothing ; .'. --'-=. 

 or infinity, and dp is infinite or nothing-. 



Ex. Let r a n , then when dp o, r a ( n. n -f. l) i. Hence 

 in the case of the lituus, where n |, r a ^/ 3". 



SPRINGS 7io#, temperature of a few of the principal ( Ure.) 



Matlock . 

 Bristol , 

 Buxton 

 B;ith , 

 Berege 



66 

 ~~ 74 



82 

 . 114 



Borset , 

 Aix 

 Carlsbad 



, 132 



, 143 

 , 165 



The Geyzers (Iceland) 212 



SPRINGS, temperature of. See Atmosphere. 

 SQUARES minimum, method of.- See Equations of Condition. 

 SQUARE roots of numbers. See Involution. 

 STANDARD measures. See Weights and Measures. 

 STARS, Catalogue of ( Naut. Aim.) 



A Catalogue of 61) principal FLved Stars for Jan. 1, 1823. 



373 



