4 HENRICI ALBERTI E R M E R I N S 



tangentia perpendiculariter ducti. Conf. omnino CI. van Sv/inden Grondbeg. der Meef^ 

 kunde, p. 497 et sqq- Unde quosdaia valorss sumsi, uti et pro maxima parte figuraia 

 235 cum literis ibi adJTibitis. 



a°. QC = Q'C =TC =T'C = — A_//( 1+^/5 ^ (Conf.Cl. v. W« 

 '^ ^ VCa — O// ^ Vi ^ /. /. p. 500.) 



Ri/" 

 -■ "-^^-^^ -1/C5-1) 



Hinc iu aQYC 



CY : CQ = 1 : Sin, Z.QYC 



Ergo Sin. iQYC = ^ 



R # /'/!_+ ^\ 



^r^n 



T/C5 -1)1/ \ V5 ) 

 RV'3 



VC5-I) 



/>/(°4 



"- + V5\ 

 V5 ) 



V3 



Ergo Sin. iQYC = ^(i±^p) 



Log. 5 = 0^989-03 



2)- 



Log. V5 — 0,3494850 = Log. 2,23607 



Log. (2 4- 1/5) = 0,62(^9632 = Log. 4,-3'J07 



Compl. Log. 3 = 9,5228787- 

 Compl. Log. Vo =2:^5£5ii2_ 

 9,8:07569 



2)- 



Log. Sin. LQYC = 9,9001785 = Log. Sin. 52° 37' ai"' 



Ergo iQYC = 52° 37' 21" = :CIIT 

 et iQCY = 37" 22' 39" = ZHCT. 



