64 



MEMOIRS NATIONAL ACADEMY OF SCIENCES. 



[Vol. XIV. 



•a 



p 



e 



CO TO 

 CO CD 



e 



TT CD 

 CD CI 



t- 00 00 



(>] r- o 



lO QO C5 

 lO cc t— 

 I— I C^ CO 



Oi Tt* CO o 

 1-H CO »o t— 

 iM T"^ O CI 



rH ^ O rH 

 t^ ITS CO .-H 



CO o r^ 

 CO r- lO 



GO r-4 r- 



CD O TT 

 CD CD 05 



Tf CO n* CO 

 OO — ' 00 <— I 

 n- CO ^ CO 

 CO CM CO (M 



CM n CO N CO CO •* CM CO CO CM CM CM CM 



t^ 00 

 00 r- 



CO -«?* 

 '^^ t^ 

 o ro 



r-HO 



O CD 



e a 



.-< C^l CM 



Ol O Oi 

 CO Jl TT 

 CM O t^ 

 O rH lO 



04 OJ CO COCO CO TT rr 



CO lO 

 O — I 

 iC CO 



CO CO 



f>\ CD 



CI cn 



CO iC 



C35 CI lO 

 O CM 0> 



r- -^ -— I 



CM --1 CD 

 CM CO t- 



CO CO 05 CO 

 CD Oi CO lO 

 CD CD --^ O 



r- 00 -^ O 



t- lO Tf CI 



CO rH T}< 

 CI I— < CO 

 CD CM >-H 



CI CO -rr 



s s 



CD vC CD lO 

 TT lO -^ lO 

 CO I— I GO —* 

 lO CD lO O 

 •^ CO tP CO 



.-Hd CMCl CMCOCO CMCOCO'^f CMCO-'T' CJCMCMCM 



O <^ 

 T O 

 05 CD 



CO CO 

 t~- CO 

 CO CO 

 CI Ol 

 O CO 



lO O GO 

 O -rr rM 

 O ^ CO 



CM CO CO CO 



(3i "^ ci r- 



CO t^ CO CD 

 V.O CO t-. lO 



O Ol CD O 

 CD ■'T CM . 



lO C 1 t-^ 

 O tits r- 

 CI CM -D 

 CD t-- CI 

 irt lO GO 



CO -^ -^ 



St 



CO r- 

 CJ -^ 



cj ^q" 



O CO 



rH CD 

 C^) lO 



o ^ 



CD t- 

 CO OS 



OS C^J CD 



CO GO C) 

 CO CI Ci 



CO r^ CI 



CM CO CO 



t-- t- CO -rf 



OS r- 0:1 CI 



Ca CM CD in 

 c^ -^ O I^ 



CO CD lO CM 



'f lO ■*! 



Ol CO CO 



CI r- CO 



CD OS CM 

 t- t-- 1— t 



t-- CO r-- CO 

 --to '-'O 



CM CO Cl CO 



OS GO Di CO 



lO ■^ lO -r 



Cl N CM Ol CMCOCO CMCOCO' 



CM CO ''T CM CM CM CI 



00 CM 



CD Oi 



^ CD 

 00 CD 



8 

 ■«t^CM 



UO CO 



a a 



CO o -— t 

 CO O f- 



r- 00 "^ 



CD ^ Tf 

 O — ' CO 



a a 



CO CO 00 to 



■^ C-1 O CD 

 CO CD CO CI 

 O CO CO CO 

 CD -f CM O 



O I^ CO 

 C> GO t- 



in c; CO 

 10 o OS 



CM CO 



CO -rf" ■^ 



CO ■v -^ m 



CO TJH Tj< 



o 



CD CI 



■*r CO 



CO Tt" 



CO CD 

 r-( 05 



CO t^ 



c; CO 



lO t- 



CO CO 



a 

 r- lO -— f 



Tj* o --H 

 O Cl C5 

 I— I Oi r- 

 CM O t^ 

 CO ■^ CO 



a a 



C: r-^ O O 

 CJ CD CO CO 

 CD CI CD CO 

 CD O C^i CO 

 T t- lO CO 

 00 CD lO CO 



a 



CO CD Cl 

 CD C) CO 

 00 1— I t^ 

 CM COO 

 t^ -T Cl 

 t^ CO r-l 



a a 



CO Ci CO CS 

 CM CM CM CM 



00 c: 00 CO 



r-H C5 1—1 Ci 



t^ lO r- lO 



a 

 ^ o 



i-t CM 

 t- CO 

 '^CM 

 00 I>- 



e 



in CO 

 CO crs 



»0 C5 



o ^ 

 C-l CO 



a a 



CO CO lO 

 O -:r CD 



O ■* t- 



CD CM Tt^ 

 O — ' CD 



a a 

 t^ r^ lO Tt* 



'^ '^ CO t^ 



nH CO C5 >-H 



00 I— « CD O 

 10 -^ CM -— « 



a a 



O --H CM 



O lO 00 



CO lO t^ 



I— t CO lO 

 10 uO Ci 



rH CMCM CMCO CMCOCO CMCOCO-* CJCI-^ CMCMCMCM 



CM CO 



CO CO 



CO -^ •*< 



CO ■ 



■ Tp in 



CO -* "^ 



a 



t-o 

 CD r- 



CD CM 



'-' O 

 O CO 

 CM O 



CM CO 



CO O 

 CD CJ 



C-1 O 



a 



-<r o CM 



t— I 00 CM 

 O CM '^ 



CD Tj" -H 

 CO -^ O 

 CO TT Ci 



a a 



00 o lO t- 



CS CD CM r- 

 rH lO — I -f 



r-t t- -^ o 

 ■^ t^ r- CD 

 CO CD in CO 



a 



CO C-l <— < 

 Ci Cft -^ 

 t^ CO O 

 CD Cl 05 

 ■^ CD CO 

 t^ 00 CM 



a a 



CJ C5 Cl 05 

 CO F— I CO f— I 

 TJ- 00 "* 00 

 CO '30 CO CO 

 CO CD 00 CO 



CICOCO CMCOCO-* CMCO-* CJCMCICM 



e 



t-- C5 



CO 05 



CO r^ 



ci T-. 



a 

 t- ■* 



Tt- CO 



I— I in t-H 

 •-H CD in 



CO -TO 

 CO lO c5 



O O CD 



a a 



00 CD r^ in 

 CD lO CD r^ 



CD in in CD 

 c) in -^ GO 



in CO Cl o 



CO rj« ■* in 



o cr; in 

 Cl o tn 



O '^ '* 



-t" -r lO 

 ■"Tf in cs 



CO -* Tji 



a 

 in o 



c: ■* 



01 « 



CO i-H 



r-l r- 



o in 

 Ci t~- 

 in CM 



t-- CO — ' 



in in in 



TP t^ CM 

 CO CMO 



CM r^ 05 



CO CO GO 



a a 

 in GO ■* in 

 CO CM in r- 



05 00 ■* O 

 O CM O CD 



o CO >n !>• 



CO CO in CO 



a 

 -* o ^ 

 CO o t-- 

 00 in CM 



CO Tf CM 



r- ■* CO 



CD GO CM 



a a 



t- 00 I>- CO 



t- CD r- CO 

 r- ^ !>• — t 



CO CD CO CD 

 CS t- C5 t- 



a 



CO o 

 CO CO 

 CO o 

 t^ CO 



O t^ 



'^ in 



05CM 

 .-t Oi 



a a 



CD CO 00 



CO CO in 



a a 



So en in 

 00 C^i CO 



in Cl i^ in 



■^ C~ CJ CO 

 -* c-1 o o 



a a 



CO CM OS 

 'TT CM in 



-^ CM CS 



Cl in ^ 



CO ■* OS 



CMCO CMCO CMCOCO CMCOCO^J* CMCO** CMCMCMCM 



e<i CO CO CO 



CO TT -^ in 





a 



CM CM 



CM CM 

 CM CM 



CO O 

 O 00 

 CM f— I 



C-j Cl 



c: o 



CO CO 



in CO 



CM 'f rH 

 CO 00 r-t 

 ^ O t-H 



t- r-j r- 

 c- in CM 



CM CM 00 



CM 00 CD OC 



f- r- CD CS 

 CM rH CD 'CO 



t- in •* CO 



CO CS O 



-f CD in 

 in t^ CM 



a a 



CD t- CD r- 



CD rH CO rH 



Oi ^ Oi —* 

 CO Cl CO CJ 

 Cl O Cl o 

 O '30 O CO 



a 



CO -:f 



in OS 



o — < 



t-- CO 



in r- 



Cl r^ 

 CO o 

 t-- CD 



Cl -H 



O CJ 



CO Cl Cl 



OS -H CO 



Cl CD in 



CD Cl Cl 



Cl in -^ 



a a 



Tf CO Cl o 



-t- r- CD c: 

 CD o CM ■* 



CD o in CO 

 coc 00 31 



^c:- a 



CM rH pH 



-* oso 



CJ t- rH 



OS CM TT 

 1-^ . CO 



C^ CO 



CM CO CO 



CO Cl CO CM 



C-l CO 



CO CO 



Cl CO T 



; ■* CO Tf 



CO 





t- Cl 

 CO CO 



in '-I 

 ^ »n 



CO t^ 

 o --* 



a 



CM CO 

 Cl — t 



00 GO 

 CD t- 



c: in 



-* CO 



CO 00 rH 



Cl r- "* 

 r- CO ■* 

 GO in i^ 

 t^ -J- 1- 



CM OS CD 



a a 



CS CD r^ rH 



cs CD in CO 



t^ CO Cl OS 



O CD 00 in 



CO CO in CO 



CD CM CM OJ 



a 



CJ rH in 

 C^l c-1 00 



CD rH t- 



OS CO "* 

 CM cs GO 



Tf in rH 



a a 



CM Cl Cl CM 



in c^i in Cl 



CO CO CO CO 



in -* in ■* 



00 GO 00 CO 

 O r^ O t^ 



in o 

 CD in 

 o r- 



CO CD 



CO CO 

 O OS 

 CD ■* 



TT in 



00 CO 



a a 



CM OS CD GO 



Tt< 00 ■* in 

 CO T?" lo in 

 in 00 r^ in 



CO "* O t^ 



a a 



r^ 01 t- 

 rH ■* in 



00 CM CO 



CO -n' OS 



rH 01 CD 



CM CO CM CO CM CM CO 



r c- ■* 



CO Cl CO c^ 



rHCO CMCO COCM-* COCOCO-* C-'JCO'* 



a 



CO CM 

 CM t^ 

 CM ^ 



CS r- 

 t^O 



in 00 

 b* cs 



rHO 



rH CO 



CO ■* CO 



CO in CM 



CD t- "H 



COO in 



a a 



CO 00 t-- T 



CM OS Cl in 



CO O Cl 00 

 t^ O CO r- 



r-. CM 00 O 



r- CO in o 



a 



C^l CO CM 



o ■* ■* 



CD ■* CO 



in in GO 

 rH r- c^i 



in rH o 



a a 



CM rH CM rH 

 ,-t a:- f-i CJi 

 O CO O CO 

 CO O coo 

 O ^^O CO 



rH CD rH CO 



O CO CMCO CM Cl CO CM CM CM -* CMCO-* CO CM CO CM 



O CO 

 CD CD 



O rH 



CO ■* 

 Cl CO 



Tf OS 



Cl 'CO 



in 



01 o 



O t^ 



a a a 



TT CO t- 

 00 .n rH 



000 



-— • o OS 



rH in t^ 



in CO CO rH 



CO CO •* in 



rH r-- cs r— . 

 CD "* in "* 



Tl" rH in ■* 



a a 



O CM rH 



CS 00 in 



Cl CM C4 



CO in in 



CM CO ■* 



1—1 CO CO CO CO CO 00 CO -* COOJ-* 



a a 



00 00 



01 ^ 



CO CD 

 CO CD 



rH in 



COO 



o: r- 



CM CJ 



^O 



r~t in 



CM CM CM CM 



COQ rH 



CO ?- in 



CM CO rH 



in CO in 



CM CM r-i 



a a a a 



■* Cl C J t^ 



O OS OS in 



CD t-' 01 C5 

 CO ■* ■* ■* 

 r-< in in 00 

 OS Tf ■— I cs 



•^ l—^ Oi 

 in 00 OS 



CD 00 rH 



O OS 

 CD in 

 CJ in 



OS CO 



CO in 



a a 



000 



CO t- 

 -* CO 

 00 CO 

 CDO 



a a 



CO CM in 

 t- GO 00 



CO -* CO 

 CO rH -* 



CM in CO 



o 00 -* in 



"* OS o r-r 

 OS C^ CO OO 



t- CO 00 -7" 

 in o r- in 



a a a 



t^ rr CM 



in 00 CO 



CD Cl O 



r^ Cl CO 

 CM in t^ 



c-1 CM CO CM 



CMC! CMCO COCOCM COCOCOCO COCOCO 



a 



00 



CM CM 



Cl OS 



in in 



CO CO 

 OS cs 



CD rH T-l rl rH 



a a 

 t^ t- t- t- 



rH r-i r— I i-H 

 ■* ■* ^ "* 



CO CO GO CO 



in in in in 



CM ci CM CM 



a a 



Cl CM Ol CM 



CO 00 00 00 



Cl CM CM CJ 



in in in in 

 t- t— t- r-- 



CO CO CO CO 



CM CM ci ci 



a 



00 CO 



o o 



QO CO 



o o 

 ■* •* 



ci Cl 



a a 



00 in in in in 



in CO CO CO CO 



CO Cl 01 Cl Cl 



in "* "S* ■* ■* 



cs ^ r~t r-t ^ 



ci CO CO CO CO 



a 



000 



J o o c 



o_ o_ o 



- ^r °r '-'r- ^ 



It, fc,fc, fc,fe, fc,(«,lt, &,(*,&,(*, l«,I*,fe, («,fc,fc,&^ 



s s 



+ I 

 s s 



+ i 



s s 



I I 



s s 



(m' ft 



+ '. 



++ I I 



+ 1 + 1 



s s s s 



000 



o_ c_ o 



fe, (*,&, !«,(*, (*,&,&, fc.t*,fe,l*, &,(«,&, 



IT! JOPBJ 



