A Summary Acmnt > 
of Laws ^/Motion 5 commmicated by Mr.Chxi&lzn 
Hugens in a Letter to the R, Society ^mi fmce frmted^ 
in French in the lournal des Scavans ef Mmh i8« 
BEfore thefe Mies of Uotim be here delivered ^ 'tis necef- 
fary to preface fomething 5 whereby the worthy Author of 
ihcm may receive what is unqueftionably dae to him ^ yet with- 
out derogating from others, with whom in fubftance he agre- 
eth. But, forafmuch as this Subjedl is of that nature, tha^ 
all Philofophy and generally ail Learned men are therein con- 
cern d> it will be moft proper, to publifli thefe Rules 
as we did thofe of D. Wdlis and D. Wren (Numb. 45. ) ia 
the Language of the LearnM, together with fome Hiftori- 
call paflages relating thereto.- Which wenowdoe, follows. 
CUm mvipmis menfdus nonnulli ^SocIetateRegia^>f^^/i- 
C9 ej ufdem Confejfu enixius urgerent , mgraviffmum illudde 
Regulis Motus Argumentumy non femel inter ^fjos antehae 
agitatum^ fedj plurihus aliis intercurrentibm rebus ^ nunquamp 
uti far eraty difeujfum exfenfumve , tandem aliquando Bx^minl 
rigido [ubjeSum confceretuT'^. V if urn equiJem fuit llluftriffmo 
C^tui decernere , ut quotquet e Seciis fuk indagandA Motifs 
indoli CAterk ineubuijjenty rogarentur-^ utfuain rem illam Me- 
ditata et Invents depromere ^ fmul et ea^ qua ab aliis Virii 
frdcellentibu^ ^ GalikTO -^utaj Cartcfio, Honorato Fabri, loa- 
chimo lungio , Petro Boirelli 5 aliifque , de argummto iflo fue-- 
rant excogitata , anger ere frccurare 'yelknt 5 eo fcil, fine ^ 
ut c^nfultis hsc fA^idcclUtisque minium fentent lis AE' a dehinclhc- 
0ria 5 qu£ cum oh[erv^tionib^is et ExferimentiSj dcbita cnra et 
fide crebr$ feraSiis , quam maxims cmg^ucrct , Givitat^^fhil^^-; 
jefhica [uo lure denaretw. 
Edit a hoc eelenfmate y incitati protinm e d>Bd.Sodetate fm^- 
mntf ir^primss Chn&mnus Hugenius , lohnnnes \Va!!ifiiis 5 
Cbriftophorus Wrennos, utjuas deMoiVLHyfithfes et Regulars 
qtmm cMdendk aliquAindiu infudaffent y matmare at que ex fe^ 
\ 
