1877.] Magnifying -power of the Half -prism. 



Crown. Dispersion and Magnifying-power. 



X- 







„%!',' _ cos %' 



m A "' _ cosx' 









JWH COS %H 



/^'a cos %a 



o 

 u 



o / 





 u u 



o t 





 yj u 



i uuu 



1 uuu 



A 

 rt 



u o 



3 



o o 



1 .AAQ 



1 UUo 



1 »AAQ 

 1 UUO 



1 





1 ^ 14 



± UZZ 



1 «A91 

 ± UZJ. 



14 



21 44 



91 9fi 



1 -CiAA 

 1 U^t^fc 



1 UOO 



1 8 



98 IS 



97 AQ 



1 .AQA 

 1 UoU 



L U'/.D 



99 



ZZ 



35 1 



34 9Q 



0*± Zt7 



± ±OZ 



1 '1 9^ 

 1 ±ZO 



96 



42 9 



41 9^ 



1 «91 A 

 1 Z1U 



1 -1 QQ 



98 



ZO 



45 55 



4^ Q 



1 .97fl 

 1 Z / U 



1 •95*3 



1 ZOO 





40 54 



4Q 9 



1 .Q/l 



1 o^o 



1 «^9A 

 ± OZU 



31 



OA. 



59 



^1 3 

 OX O 



± OVO 



1 -^ftzL 

 1 OU"± 



•39 



OZ 



54 1 1 



Otfc J_-L 



^3 8 



OO O 



1 ./I P^fl 

 1 4fcOU 



L *±10 



33 



56 26 



55 90 



1-518 



± o±o 



1 'Aid. 



34 



58 47 



57 35 

 eJ / OO 



± ouu 



1 -54/7 



35 



61 21 



60 



1-708 



1-638 



36 



54 2 



62 33 



1-847 



1*755 



37 



67 2 



65 21 



2-047 



1-915 



38 



70 18 



68 21 



2-338 



2-136 



39 



74 20 



71 51 



2-880 



2-495 



40 



79 32 



76 9 



4-210 



3-210 



41 





82 7 





5-510 



Light Eeflected. 





Polarized 











Total. 



x'- 



in plane 

 of incidence. 



in perpendicular 

 plane. 



o 



per cent. 



per cent. 



per cent. 







4-6 



4-6 



4-6 



10 



5-1 



4-2 



4-7 



18 



6-3 



3-2 



4-8 



26 



9-4 



1-4 



5-4 



30 



12-3 



0-5 



6-4 



34 



f H 17-6 



o-o 



8-8 



\ A 16-0 



0-0 



8-0 



36 



f H 22-7 



0-9 



11-8 



\ A 20-5 



0-6 



10-6 



38 



J H 31-6 



4-4 



18-0 



\ A 27-7 



3-0 



15-4 



39 



J H 40-7 



9-4 



25-1 



1 A 33-6 



6-0 



19-8 



40 



J H 53-4 



21-7 



37-6 



\ A 43-2 



12-8 



28-0 



41 



A 61-7 



32-6 



47-2 



c 2 



