(8 ) 



Talcat myrterli , non admodiim firmo niti fundamcnto," 

 ferio dolendo iaduram tcmporis ct laboris iii hac de 

 niimeris pcrfcclis dilquihtionc coUocatorum. 



G. W. KRAFFTII DISSERTATIO DE NVMERIS AMICA^ 



BILILVS. 



Proprictatcs ccrtas numcrornm vcl mcdiocritcr in Ma- 

 thcfi \crlatus cafu inncnire , c;isdtm autcm dcmon- 

 ftrare non acquc fiicilc valcbat , quoniam haud vulg.uis 

 (['cpcnumcro ad id cnicicndum rtquiritur figacitas. lii 

 hanc cladlm rctcrcndiim c(l problcma quod fibi Iblucn- 

 dum fuiiilit Cl. Kr.iJTtius df Kumcris Ainkabilibuii , qnod 

 Algcbrac rcgulis (iibiici polTc haud putauit , qni primus 

 horum nimierorum mcntioncm iniccit, Qkbcrrimus ohm 

 Arithmcticus Sticfclius. Supcratum a Cartcfio difhcilli- 

 mum hoc ctTc problcma ollcndit vir Cl. quidcm, (cd ct 

 notat , nimib angu(\os tcrminos ipfi pofitos cflc , quoniam 

 (()lutio ciu^dcm intni potcntias biiiarii conclula fit , cuiiis 

 tamcn rclhiiflionis minimc indigcat. Ilacc omnia ritc 

 et clcgantcr in di^Tcrtationc iplii , quac practcrca plurimia 

 alia ad hanc dodliinam fpcclantia continct , cxpofita (imt. 

 Omnibus crgo , nofiro quidcm indicio , qni hanc Mathc- 

 fcos partcm acfiimarc valcnt , (olutionibusquc probkma- 

 tum diaphantaconim dclc(ftantur , di^Tcrtatio hacc mirum 

 quantum placcbit , prac(crtim fi , qtiac Ccltbcrr iiuis 

 Kulcrus dc his numcris in mms A^lis Kniditorum iMcn- 

 fc Maio 174-7 p. 269 cxpoluit , conlcrantur. 



niY- 



