u SCIENCE ABSOLUTE OF SPACE. 



= st.Z. Therefore also ZDCP+ZCDO 



II. If R falls without the sect FG; then 

 ZXGR-ZMPR, and let MFGN^NGHL= 

 LHKt ). and so on, until FK=FR or begins to 

 be &amp;gt;FR. Then KO II HL II FM ($7). 



If K falls on R, then K&amp;lt; ) falls on RS ( 1): 

 and so ZRFM+ZFRS=ZKFM+ZFKO=Z 

 KFM + ZFGN = st.Z; but if R falls within the 

 sect HK, tlu-n (by I) ZRHL+^KRS=st.Z = 



#14. If BX II AM, and CP II DQ, and ZBAM 

 + ZABX&amp;lt;st.Z; then also ZDCP+ZCDQ&amp;lt; 

 ^t.Z. 



F..r if ZDCP+ZCDO were not &amp;lt;st.Z, and 



ibv ^ 1) were ^st.Z, then (by ^ I.M also Z 

 BAM+ZABN-st.Z (contra hyp.). 



#15. \\Yi--liin- ^ l^and H, the System of 

 Geometry resting on the hypothesis of 

 truth of /:itc/i(/ s . Lvioiu A7 is called : / 

 the system founded on the contrary hypoth- 

 [8j esis is .s. 



. /// things ic /lie /i arc not expresslv said to 

 ih in : or in .V, // is understood are enunci 

 ated absolutely , that is are asserted true 

 whether ^ or S is rca/i/v. 



