PHYSICAL TESTS OF EOAD-BUILDIXG EOCK. 
97 
lON^VCS^OL-NMrtSHNcNN X C; CM l^ 
;S t- CO -sr i-h 
cm .'d cd i-o -? £2 i- 
• i- rr r~ co co cm i— rj" -*r is: < 
CtDOlNCNL-aNW TT :£ Ci X X O OXL-:t>3)N«INN «»X^NrrCL-NOCXSt> WOCCNO- 
OOt-^OXJCOXil-O^Hr^Xl « « N •* ■* L"5 ONrHMXNXiCN OOXOOKL-NSL'OO^'OCN'fONCOOM 
cm' ci id -*~ iC od -<j< i-! co x' ffl x o co w' m „l-' tt ^' lo x'x'x'x'm' i-!^'m'* •>*! i-h cm rr id ^r o id cd cm x' id x' cd cm co cd cm 
CONNCC50INL':NI>'fl'NT)iL-c:^M^CI>CINNXt~XXX-5'L-t^CC05CCTrH021>NXCC^(NL'5 
^N^dxVdx'NTN~^NdNxcqV'^^^ic\o'o^c*V^TrV'a^VT r VH\-c'H'^x'dx'o 
COO CON^iHt«mocqL'5*H'a'?5K'>tNXSNN-OHOiOC5W**OJeMH«H«'<?t»*NOOXffi« tj 
co od id id <d e4 cm' isl co t' cd x" id -& «o >d d id oa -4 cd id id id t>^ cd ;d cd id x' i> x' x' -* x' cm' x" >d cd cd cd cm' -*? cd t' cd o 
•_: cr cr -_; ■- i~ io i^ t- t~- o 
j a. 
in 
c '§ 
t£00_2 • 
alls.- 
?5 33 Q ! ( 
«a. 
® 8 a . ° " 
o 
C3 • C3 
6 B 
5SSES 
■ o c c o 
iCCP 
. Q CO , , 
O DO g C O 
■d 73 g^g -q -p o 1 ^ ' 
33 :lli' 
1^. s 
E.S 
15 
O pL, O v 't-oO 
m >>,"« £55 5 ^ S "3 
S £?© 8 5 >,c > £ 
= = s asgsg« 
So 3d'® 
go 
- = 
'■>3 > 
i ® . _© 
I "a g "a =- ■ 
' N N S - X M ■ 
I CM CM CM CM CC ~ C5 CO —i — l i-l >-t i-i < 
i CO OS CM iH : 
XONC3)W. 
cicNi^N ~ cm ?- r; x x t~ ■ .- o c n o 
ooc^h .m:ic)::ccm>cs>. 
-.mM'Mcicim::mc!i: -r cm cm cm t-h -^ 
CDNNNXNNNCCCCCC.CwHCiXCSCBHCO 
31693°— Bull. 370—16- 
