Arithmetica Logarithimica . De LogirithmorHrn dcfimtione & nominis notdtione. g] O g arit h m i funt numcri qui proporcionalibus ad-iun&i ajquaies feruantdifferentias. Datis quibufcunque ahj numeri ifque di verfiijsadiungi poterunc qui non incommode gcnerali Lo-garithmorum definition! conveniant 6c vium aJiqucmnoningratum praberc poterunt. vt fi numcri continueproportionates fucrint pote-runt ijs pro Logarichmisadiungi numeri infigniti^ velB, vel C, vel £>, vt hie vides. vel alij, modo hoc vnicumlervetur3vt Logarithmorum, vna crefecntium vel decrefcentium di
Arithmetica Logarithimica . De LogirithmorHrn dcfimtione & nominis notdtione. g] O g arit h m i funt numcri qui proporcionalibus ad-iun&i ajquaies feruantdifferentias. Datis quibufcunque ahj numeri ifque di verfiijsadiungi poterunc qui non incommode gcnerali Lo-garithmorum definition! conveniant 6c vium aJiqucmnoningratum praberc poterunt. vt fi numcri continueproportionates fucrint pote-runt ijs pro Logarichmisadiungi numeri infigniti^ velB, vel C, vel £>, vt hie vides. vel alij, modo hoc vnicumlervetur3vt Logarithmorum, vna crefecntium vel decrefcentium differentia?{inta?quales3quoties numeri qnibus iuntadiun&i funtproportionales. vt nonincommode Logarithmi dici ^QRvtiifiumererumpoprtiondiuin comites <£qui-differmtes. Qui ideo videntur a clariflirno Inventore Logarithmi nominatiquia numeros nobisexhibent eandem inter fc feruantes rationcm. * A B c n . Atque vt horum Logarithmorum naturam 6c affe- ftioncs melius nolcaraus, Lemmata qua:dam 8 16 Jl 64 128 8numcri LogaiPropor-tioned. A 12 _i 45 £ $6 _78 9 10 5 8 11 420 D 35 2p 25 23 20 II 23 I7 12 25 14 LogarLogarLog/ar [ftb : Lemma prim-Am, Si quotlibet numeri Oatuantur arqualitcr crdcentes vel decrcfentea co:rum differentia? iunt intervals corundem proportionates. Vt innumeris D ,«. in-ter primurn & tertmm fmit duo intervalla, inter tertium & otoum funtauinque intervalla. «o differentiamprimi Sc tertij 6j«Tc ad differential* ter-tij &paa«i ii,vtduoadquinquc. Idcirco in ferie numerorum continue proportionalium, datis dtiomm quo-rumcunque Logarithmic poterimusalterius cuiufvis Logarithmum in emm horum numerorum inter fe intervallum 6c tertijab horum alter-utro, daturetiamdatorum Logarithmorum differentia. Datis ergo duobusinteruallis& Logarithmorum datorurn differentia, altera dati 6c quxfiti Lo- & garith- £ Aritlmetka carithmorum differentia proportionate inventa erit. vt funto 4.^
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Keywords: ., bookcentury1600, bookdecade1620, bookidarithmetical, bookyear1624
