Peirce — Induction Coefficients of Hard Steel Magnets. 353 



Table Til. — Specimens (1.3 5 cm. long) of round ^^ Crescent Tool SteeV^ of different 



brands. 









Moment per gramme 





■ 2 



-c 









of magnetism induced in 



■~a 



o-S 







^ 



.2 



the specimen when placed 





Sfl.C 



;:g^^-« 





4) 



■1^ 



*• lengthwise " in a mag- 



^§r„ 



BZ^ 



"SgoJS^ 





a 



•a 



netic fie d of unit 



ga-^ 





o-Sars 



Brand. 



a 

 a 



|i 

 Pi 



strenuth. 



?f i 1 p!| 



e condi- 

 n of a sea- 

 led mag- 



■permanent 1 

 ment pev gra 

 cjise ot the ' 

 d" magnet. 



anent m«gn( 

 nl per gramc 

 e of the seas< 

 gnet. 



oximate rati 

 uced momen 

 unit field to 

 nent momen 

 e of the seas( 

 gnet. 





i 



5.S 



^|g.sLs.l2? 





lila 



a 1) 2 c3 



s^aSa 



US'! la 





Q 



<J 



1^ 1 ^ ' 





Uj 



0^ 



< 



"D. R." 



1-28 



133 5 



0-23 021 



0-25 



12 



10 



0-025 



i( 



0-80 



53-0 



0-23 1 0-23 



24 



32 



23 



0-010 



«' 



0-64 



34-6 



0-23 23 



0-23 



44 



31 



0-007 



(1 



0-47 



19 



0-23 022 



0-22 



48 



42 



005 



«' 



0-32 



8-4 



0-23 22 



0-24 



56 



53 



0005 



" Crucible Steei" . 



1-28 



133 5 



22 0-22 



0-22 



18 



16 



0-014 



u 



0-80 



530 



0-24 0-24 



0-24 



31 



22 



0-011 



a 



0-64 



34-6 



0-28 0-26 



0-28 



38 



30 



0-009 



(1 



050 



20-0 



0-31 0-31 



0-31 



46 



34 



0-009 



"Crescent Extra". 



1-28 



133-5 



025 0-22 



0-23 



14 



n 



0-021 



11 



0-80 



53 



0-26 [ 25 



26 



32 



26 



0010 



i( 



64 



34-6 



29 1 0-26 



0-27 



40 



32 



008 



K 



50 



20 



0-28 



0-28 



28 



47 



37 



008 



" Double Crescent" 



1-37 



157-0 



0-23 



0-21 



0-22 



11 



9 



024 



u 



0-80 



530 



25 



0-24 



0-24 



39 



28 



0009 



(( 



0-64 



34-6 



0-28 



0-25 



0-25 



43 



32 



0008 



'' 



0-52 



21-2 



0-28 



0-27 



0-29 



48 



41 



0007 



"H T. C." ... 



0-80 



53 



0-30 0-30 



030 



21 



31 



0-010 



u 



0-64 



34-6 



0-34 0-32 



0-32 



51 



42 



0008 



11 



053 



22-5 



36 ' 0-32 



0-32 



63 



51 



0006 



Table 1Y.— Tubular Magnets of Polished Crescent Drill Rod. 



1 



a 



d 



i| 



■■Ss 



.2 

 o 



-a 



a 



"S 

 a 



Sa 



ent per gramme 

 he magnetism 

 U' ed in the sea- 

 ed magnet when 

 Bed lengthwise 

 field ot unit 

 jnsity. 



anent magnetic 



aieiit per 



mme of the sea- 



ed magnet. 



oximate ratio 

 lie induced 

 jnetic moment 

 he seasoned 

 ^net, caused by 

 tilt field to the 

 manent moment 

 he magnet. 



m5 



"S CI 



aa 



.5f?5 



£'-.-ca-=';:5 



So«a 



'^"'^«*^«a^*' 



ga 



^S 



.2i 



^b. 



oo.ax'E.a.2 



■ saSjg 



p:oa.2acsao 



a 



o 



ft 



S 



Q-i 



< 



10-2 



1-28 



0-94 



42-9 



0-23 



23 



0-010 



7-6 



1-28 



094 



31-8 



0-20 



16 



012 



7-1 



0-95 



0-70 



14-8 



0-22 



20 



0011 



5-2 



0-95 



0-70 



11-1 



0-21 



15 



0014 



