Certain Seasoned Hard Steel Magnets. 



253 



Table VII. 



Table VIII. 





Crescent Polished Drill Rod. 



Crescent Polished Drill 



Rod. 





Diameter, 95 cm 







Diameter, l-ll cm . 





Weight per cm 



of length, 



5-5 grams. 



"Weight 



per cm 



of length, 



7 6 grams. 





CD 03 





e3 



cd 





3°n 



•2*2 £"3 



S 





J»« 



c * a 



V 





-03 



at- r® 



CD 





S3 C."S 

 0) tUfl 



|5fi 



■a 





|la 



fl to o 





co 



i 



a 



I 8 " 



fSd 



d 03 — 

 BQOJfq 



SaJ6° ? 

 *".a " is 



* s ka£ 



o 

 'o°rs 



c 



cd 



1 



a 



C C3 fl 



as 13 



CJT3 00 ' 



og-^3 



O 



1© 



o * 



o 



£ CO 



H CD CO 



■sg^is 



§1 



o 



a»s 



■cS^SS 



°S 





 "5 



a 



* - • 



Sn.fi ^ i+J CD 

 «> te 53 « 



_, 9 C oo 



£ So 



11 



Is 



a 

 60 



s 



cd o> o> 



1:1 

 las 



O s o 



i loss per 

 ment whi 

 m about 

 seed in t 

 lower te 



«P 



>- -( 



« 5 

 53 -a 



rf 



5? <=«o 





So 



h} 



3.2,- 



atmO 



CD S& S.5 



S o 



o on 





<3 



S 



H 





«] 



s 



H 



6 



10-0 



0*00086 



0-00078 



4 



5-5 



o-oono 



0-00109 



8 



14-0 



0-00078 



0-00070 



6 



8-5 



0-00088 



0-00087 



10 



170 



0-00071 



0-00063 



8 



100 



0-00070 



0-00070 



12 



20-5 



0-00063 



0-00056 



10 



12-0 



0-00062 



0-00062 



15 



26-0 



0-00055 



0-00049 



15 



195 



000052 



0-00051 



20 



36*5 



0-00040 



000036 



20 



30-5 



0-00048 



0-00047 





Table IX. 







Table X. 





Twice hardened Crescent and 

 Jessops Drill Rod. 

 Diameter, 95 cm . 

 Wt. per cm. of length, 55 grams. 



Jessops Square Tool Steel. 



Dimensions of cross section - 81 x 0*8 l cm . 



Wt. per cm. of length, 5-3 grams. 







£^x* 





cd Si 



■~t*a 



53 



00 



33 



as 



a 



a 

 cd 



Pi 



a a.Ti 

 cd t>cs: 

 52 = 



£§o 

 o> co a 



a a — 



c3 °° cj 



a s co 



!«© r l 



g.2c 3 



^|o^oj 



4) ojO 03 

 S« ~ Ufa 



tut: °_ p <u 



«g s> a 



« 



a 



a 



♦a * 



O 4> • 



SbcS 



a g3 

 5 ® ^< 



-SabD 

 1- • 



a«c 



l*tp 



a.2^0 



■c; 33 a 



cc 



CD 



O 



"SSs 



£" 



w 



cm 

 a 



CD 



«6 £ 



§oS 

 P 3d 



fl?oS. P 



o S " 5 q 

 _ a 8 tc ' — ' 



a 



a 



CD 



tS+» CO 



.so a 



gs2 



fn _,*3+acu 



ft 51 O.S (H 

 CO*^' ^ ^ 



a °5 

 a5"S 



►-J 



ate 



500*0 

 cu 8-S p.5 



-J 



S.S r 



a-ai;a^ 



4) CO 





<! 



S 





< 



s 



H 



4 



5-0 



0-00158 



4 



4-5 



0-00163 



0-00139 



6 



7-5 



0*00133 



5 



6-0 



0-00145 



0-00116 



8 



100 



0-00115 



6 



8-0 



0-00125 



0-00102 



10 



13-0 



0-00106 



8 



11-5 



0-00103 



0-00087 



12 



16-0 



0-00094 



10 



16-0 



0-00094 



0-00078 



15 



20'5 



0-00088 



14 



24-5 



0-00080 



0-00065 



18 



26-0 



0-00082 



20 



38-0 



0-00065 



0-00051 



