[ To face page 4G2. 



F i a U E B 1. 



Survey of that part of the range of Nature's Operations which Man is 

 competent to study. 



Geoup A. 

 Stellar 



Group B. 

 Planetary 

 intervals. 



Group C. 

 Laboratory 

 measures. 



Ultra- 







Stellar 



l 





He mote- 



M 



£. 



KESS . 



P 



Il| 



a 









i~ 









,:, 





■--,- 







S i% 



= '=-■ 



Fl 



~ii'- 



.si* 



jti 







■^ 



5- c 



.11- 





HI 



^ | g 



~ 







qdS 



assa 



-5 



T 



w 



.3 



Group D. 

 Molecular 

 quantities. 





Infrv- 



ooo ooo ooo ooo ooo ooo ooo' ooo ooo-bod boo 000 000 OOO 000 000 



I 



UNKNOWN.] 



UNKNOWN. 



METRO 



ME iZ Hi T R E T S. 



- 

 o 



ll! 



III 



J" 



r:' 

 = 



111 



to travel the distances 

 represented by a 

 unit inserted in the 

 places indicated. 



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