C 567 ) 
Apparuiffe in Germania Cometam audivi , menfe Vecemhris nufqmm 
tamen ipfe confpext^ nee a no^ris alkubt vifum intellexu 
He^ern^nohc monitu tuo exeitus ^ Cotlos infra Procyonem perlujlraHi^ 
Nebulofam offendi^ latam^ & SteUulis confer tipmatTU Banc eandem credo^ 
ej^uam 1u obferva^i 5 cmiQV eflem^ (z quanta ejus fuerit Veclinatio vel Alti- 
tudo meridiana^ indicaveris, Novam etiam in Tedore Cetis j^pjus ante o&o 
me^fes vidi^ nec minorem qukm 2W innuis. Sed de Mercuric nibH pronun^ 
eiar^e pojfum^ ftquidem nuUas circa ipfum circumpofitas fixas intra tubi capaci- 
tatem inveni 5 & ampliora nondum confe&a funt Injirumenta , quibuf ejuf- 
dem a Stellis remotioribus diftantia rite capipoffint. Vale^Vir Clarijjime^ &y 
fiquas Occultationum futurarum Obfervationes Cotlt indulferim^ perge^ ut 
expifii^ me earumfacereparticipem» Ego me as vicijfm lubentiffime femper 
concedere paratus fum, Grenovici, A a 6^6, Martii 4. 
An Account of Books, 
T8 cwm ySarofAVii^cf.^ &c. Cum Verfione Notu J oh. Wal lis S6\ ih, 
Dc^^ Geometric Frofejforis Saviliani. Oxonii c theatro Sheido- 
^r^^ Hough this Traft of Archimedes his Arenarius have been f r- 
X nierly twice printed in Greek, and thrice in Latin- yer did 
the Learned Dr.WaHu fee caufe enough to publifli another Edit ion, 
therein prefentingus with many emendations in the Original , and 
withanew Verfion in L^^/>?, and adding fome fliort ftriaure:5 ftr- 
ving to illuftrate the fenfe thereof. And the Book feemed to de- 
ferve thefe pains, as being not only an elegant and acute piece, wor- 
thy of ^r^A/W^^/,but alfo an excellent Monument prefer ving both 
a pieceof remote Antiquity , as is that of Arifiarchm Samius his 
Hypothefis, revived by Ctpernicus^ and that of the Vorick DuUli 
in Profe. Befides,it exhibits the foundation laid of the Jrtof Nnm- 
bring or xz'C^^tx Notingof numbers ^ now in ufeamongfl: us, with Sa- 
TAcentque or rather Indian Cyphers. And it accommodates thofe 
numbers ^^B^y^i^-^i^^&c not only to numbers proportionalin a 
Muple ratio; but alfotoany others, in any whatfoever, that are 
in a continual proportion from the Unite; And they are the fame 
with what is commonly calPd Unity Root^ Quadrat , Cube , Eiqua- 
irat^ to wit, 
« ^ 7 g ? »5 
t a aa a"^ a^, &c. 
As to the argument of the Book, *tis well enough known to the 
Gurious, thac it Geometrically Ihews a number exceeding that 
Eeee which 
