Huygens, Christiaan, Christiani Hugenii opera varia; Bd. 2: Opera geometrica. Opera astronomica. Varia de optica

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184454VERA CIRCULI (qui exempli gratia ſint G H, E F) in hyperbola aſymptoto
O A paralleli;
& inveniatur ſpatium hyperbolicum EGHF
per hujus 32, quod breviter, fit quoniam G H, E F, parum
inter ſe differunt.
ex ſuppoſitione, unius numeri, exempli
gratia G H, datur logorithmus, &
proinde datur ejus logo-
rithmi ratio ad logorithmum denarii arbitrarium, quæ ea-
dem eſt (ex hactenus demonſtratis) cum ratione ſpatii hyper-
bolici G I K H ad ſpatium hyperbolicum L I K M, datur au-
tem ex hujus 32 ſpatium L I K M;
& ideo innoteſcit quoque
ſpatium I K H G, cumque detur ſpatium E G H F, innote-
ſcit quoque E I K F;
& proinde datur logorithmus numeri
compoſiti E F;
cumque ex ſuppoſitione dentur logorithmi
omnium numerorum numerum E F componentium, exce-
pto numero illo primo cujus logorithmus deſideratur, dabi-
tur quoque illius numeri primi logorithmus, quem invenire
oportuit.
Exempli gratia, propoſitum ſit invenire logorith-
mum numeri binarii, ſuppoſito arbitrario numeri denariilo-
gorithmo, unitate cum 25 cyphris.
duo numeri compoſiti
parum inter ſe differentes ſunt 1000 &
1024; numeri 1000
datur logorithmus, nempe triplum ſpatii 23025850929940-
456240178700 in antecedente inventi, poſito ſcilicet illo
ſpatio numeri denarii logorithmo arbitrario;
numeri 1024
ignoratur logorithmus, eſt enim compoſitus ex ſolo numero
primo 2, nempe ejus decies multiplicatus eſt.
applicentur hi
numeri compoſiti in hyperbola, ut dictum eſt;
ſitque G H
1000, E F 1024:
ſed quoniam I K unitas eſt 1000000000000,
erit G H 1000000000000000 &
E F 1024000000000000,
&
per hujus 32 inveniatur ſpatium E G H F 237165266173-
160421183067 (ſeriem convergentem hic appono,

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