Descartes, René
,
Renati Des-Cartes principia philosophiae
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129. </
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Cur ejus fragilitas minua
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tur, ſi lentè refrigeretur
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272
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130. </
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Cur ſit pellucidum
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131. </
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Quomodo fiat coloratum
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274
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132. </
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Cur ſit rigidum inſtar
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arcûs; & generaliter, cur
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rigida, cùm inflexa ſunt,
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ſponte redeant ad priorem
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figuram
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È
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133. </
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De magnete. </
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eorum ex antè dictis, quae
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ad ejus explicationem re
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quiruntur
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275
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134. </
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Nullos in ae*re nec in aquâ
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eſſe meatus recipiendis
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particulis ſtriatis idoneos
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276
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135. </
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Nullos etiam eſſe in ullis
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corporibus terrae exterio
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ris, praeterquam in ferro
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277
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136. </
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Cur tales meatus ſint in
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ferro
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È
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137. </
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Quâ ratione etiam ſint in
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ſingulis ejus ramentis
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278
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138. </
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Quomodo iſti meatus apti
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reddantur ad particulas
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ſtriatas, ab utrâvis parte
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venientes, admittendas
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È
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139. </
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Quae ſit natura magnetis
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279
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140. </
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Quomodo fuſione fiat
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chalybs & quodvis ferrum
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280
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141. </
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Cur chalybs ſit valde du
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rus, rigidus & fragilis
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281
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142. </
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Quae ſit differentia inter
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chalybem & aliud ferrum
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È
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143. </
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Quomodo chalybs tempe
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retur
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È
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144. </
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Quae ſit differentia inter
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meatus magnetis, chalybis
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&sferri
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283
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145. </
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Enumeratio proprietatum
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virtutis magneticae
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284
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146. </
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Quomodo particulae ſtria
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tae per Terrae meatus fluant
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287
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147. </
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<
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Quòd difficiliùs tranſeant
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per aerem aquam, & ter
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ram exteriorem, quàm per
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interiorem
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288
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148. </
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Quòd faciliùs tranſeant
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per magnetem, quàm per
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alia corpora hujus terrae
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exterioris
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289
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149. </
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<
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Qui ſint poli magnetis
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È
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150. </
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Cur iſti poli ſe convertant
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verſus polos Terrae
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È
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151. </
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Cur etiam certâ ratione
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verſus ejus centrum ſe in
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clinent
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290
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152. </
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Cur unus magnes ad
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alium ſe convertat & in
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clinet, eodem modoatque
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ad Terram
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291
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153. </
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Cur duo magnetes ad in
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vicem accedant, & quae ſit
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cujuſque ſphaera activita
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tis
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292
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154. </
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Cur interdum ſe invicem
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refugiant
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294
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155. </
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<
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Cur ſegmentorum magne
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tis partes, quae ante ſectio
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nem junctae erant, ſe mu
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tuò etiam refugiant
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295
<
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156.Cur duo puncta, quae
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priùs in eodem magnete
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contigua erant, in ejus
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fragmentis ſint poli diver
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ſae virtutis
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È
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157. </
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<
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Cur eadem ſit vis in quâ
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vis magnetis parte, ac in
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toto
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È
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158. </
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<
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<
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Cur magnes ſuam vim
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ferro ſibi admoto commu
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nicet
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296
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159. </
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Cur ferrum pro variis
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modis, quibus magneti ad
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movetur, ipſam diverſi
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modè recipiat
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È
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160. </
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Cur ferrum oblongum
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eam non recipiat, niſi ſe
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cundùm ſuam longitudi
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nem
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297 </
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