Diffuse Reflexion of Light on Matt Surfaces. 207 



(2) Chromate of Potash (K 3 Cr0 4 ) (yellow) : X = 589 pp. 



e. 



-50° 



8=0°. 



e==20°. 



i=40°. 



i=60°. 



«=80°. 



0824 











-40 











1510 



-30 





... 





6672 





-20 









69 »7 



2572 



-10 







8948 















9002 



7212 



2723 



+ 10 





9600 









+20 





9423 



8704 



6995 



2420 



+30 



9375 











+ 40 



8744 



8440 



7817 



6426 



1892 



+60 



6947 



6673 



6004 



5036 



0830 



+80 



2424 



2186 



1398 



1404 



1017 



(3) 



Zinc or Rinmann' 



5 Green : 



\ = 535 pp. 



e. 



*=0°. 



;=20°. 



i=40°. 



*±s«9°. 



2=80°. 



-50° 











1460 



-40 











1138 



-30 









6384 





-20 









6687 



1992 



-10 







8647 















8712 



G958 



2263 



+ 10 





9111 









+ 20 





8920 



8462 



6694 



1992 



+30 



9375 











+40 



8850 



8048 



7554 



5833 



1573 



+60 



6997 



6130 



5949 



4808 



2362 



+80 



2382 



1445 



1785 



1971 



2360 



(4) Ultramarine Blue : \= Mixed waves. 



e. 



2 = 0°. 



£=20°. 



i~m°. 



2=60°. 



* = 80°. 



—50° 











1030 



-40 











1780 



-30 









6277 





-20 









6675 



2667 



-10 







8544 















8726 



6676 



2750 



+ 10 





9576 









+ 20 





9121 



8470 



6737 



3042 



+30 



9375 











+40 



8947 



8703 



7729 



5761 





+ 60 



6961 



7169 



6943 







+80 



1968 



1851 



0951 







