Contributors to This Issue 



S. V. Sii VI Ki.iToN, U.S., K.K., I iiivcTsity of Micliinan, 11)1."). 

 Anu-ritMii Ti-lrplmiH' aiul Ti-ioiirapli t'ompany, Kngini-fring; Deparl- 

 iiu-iit, IIM.V 1',); Di'p.irliiu'iil of I)f\<.'lopmoiit ami Rcsearcli, 101!) . 

 Mr. Shaiklc'toii's work ii.is hvcn romiirtrd with toll rirniit (ifxelop- 

 meiil, ini'hi<liii^ loll swililiho.irds, lili'plidiu' ripcaliTs and list hoard.-;. 



II. \V. 1*1 kc i:i.i.. B.S.. Harvard IniMrsity, l',)05: KiiKiiufring 

 Dipartimnt of tiu- W'osti-rn Klertric Coiiipain-, lOOlv 2{): !)i'|)artincnt 

 of l>f\e'lopmc-!U and Rest-arch, .-\iiu-rican Tt-k-phont- and T(.-k-j;raph 

 ("onip.mv-, 1!)2() . Mr. Piirccll lias in-i-n as.soriati'd with the (k-sij;n 

 of i-ltTlroinajjni'ts .ind niori- rc-ci-ntly with tin- (k'\ fiopnu-nt of Tnachiiu- 

 switrhin.i; apparatus. 



W \i II K .\. Siii;\\iiARr, .A.M., IniM-rsitx- of Illinois, i'.»i:i; .\.M., 

 lOlf; I'h.l)., I 'ni\frsil\- of t'aiilornia, UI17; Kii^inri-rini; Dt-part- 

 ini-ni, W'l-stcrn Kk-ctrir Conipan\\ 1!)1S — . Mr. Shewhart has been 

 i.'nsai;i-<l in the study of the relationship between the niicrophonie 

 an«l the ph\sico-cheniiral properties of carbon. 



Kdw.vkd (". Mi)i,i\.\, Kngineerinj; nepartmeiit of the .American 

 Telephone and Telegraph Company, 1901 1!), as engineering as- 

 sistant; tran.sfem-d to the Circuits Design Department to work on 

 machine switching .systems, IDOo; nepartment of Development and 

 Research, lOH) Mr. Molina has been closeh' associated with the 



application of the mathematical theor\- of probabilities to Irunking 

 problems and has taken out se\-er,il impori.ini p.ilenis ri-laiing to 

 machine switching. 



RniiitiNs V. Crow i;i,i,, .Souihern New I'.ngl.ind Conipain-. assistant 

 chief operator. New Ha\en, 1007 00; chief operator. New London, 

 1000 10; New ^■ork Compaiu , assistant manager, 1010 \'.i: engineer 

 in the Tr.it^c Department, lOi:} Itj; Kngineering Department. 

 .Xnieric.ni Telephone and Telegraph Company, lOKi . Mr. Crowell 

 has In-en concerned chiefly in the preparation and introduction ot 

 peg counts and force adjustment routines. 



T"r\N(I> T". I, II as. Plant .ind Ijigiiu-tring Dep.ulnu-nis ol .\.sso- 

 ciate Companies. 1002 10; Installation Deparlment We.-tern Klectric 

 Company. 1010 13; Flngineering Department. 1013 . Mr. Lucas 

 is a materials engineer and has speci.di/ed in the .ipplicalion ot micro- 

 scopy to influstrial problems. 



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