OF THE UNITED STATES. 



365 



Micrometrio 

 Standard* reailingssub- Mean of the 

 compared. trafliv.-Ooni four results, 



■8",8. 



Bar A 0",044475" 



V 0',044'2,iO 

 Chang. «nil for end. 



A 0-,0443'25 



V 0",044425 



Correcleil re- ^(<.■nn 



Correction of suits lo !>• sub- Actual value of of the 



micrometer. tmci.-.l from the distance. tli- rnio- 



"8", 8. meters. 



.0,0443690 O'.OOOirroO 0',0441915 78",7558085 



B 0",0433r5' 

 a 0'.043750 



Chang, entl for end. J>0",0433620 O",00017340 0",0431886 78",7568U4 

 B ,043150 

 a ",043175 



C 0",043575 

 3 0",043775 

 Chang, end for end. 

 C 0,043850 

 3 0',043975j 



>0',0437940 0",00017520 0',0436190 78',7563810 



49°.8 



D 0",0433001 

 a 0,043100 

 Chang, end for end. W',0433625 0",00017345 0",0431890 78",7568110 

 D 0' ,043550 I 

 a 0",043500j 



50',5 



In the afternoon of the same day the comparisons of tlic 

 metres were repeated, with the results presented in the fol- 



lowing table : — 



M'-H-' 0,045390' 



M.+, 0",044625 



Endschang. tomid. J>0',0448290 0".00017930 0",0446497 78",7553503 



M'+' 0,044750 



Mj+/ 0",044550_ 



50\3 



M<-+y 0',040475") 



M, + /r 0",040525 | 



Emtschang. tomid. W',0408500 0,00016340 0",0406866 78",r593134 



M +y ,04085 



Mj-f-zt 0',0415; 



mid. ^0 

 0850 I 

 1550j 



M+y 0",043175" 

 M -+-« 0,042450 

 Ends chang. to mid. 

 M .042.)0() 



Mi+X a',042525 



)",0426125 0",00017040 0",0424421 78',7575579 



51",8 



