( 49H ) 



il will jilwavs cxpcriciicc ;i |»i-cssiirc l\ ()\\\\ \\\v dislancc s|)|ioros 



ninkc ;ni (v\('('|)lioii lo lliis rule, tur [larls of llicm, lalliiiLi- williiii 



ollici- (li>lnii('(' s|)lieivs (.'xjKM-icncc a prcs.siii-c zero. 



L eau liiid jk» i-oasoii tV»i- lliis c'.\('c|)lio)i and llicrdnic I ilnid< die 



17//;^. 

 \alii(' .. -7^ iiicorrocl. 'I'lio (|iiosti()ii wIkMIkt in lacl a con-cclinn miisl 



\)v a|>[>li('d drpciids on die lacl \\ liclhci' >., is (M|ii;d lu / or nol. 'Idiis 

 nia\" l>e in\('sli^al('<l in tlic tollowiiiu' manner. 



i.cl .1/ in llic liiiin-c represent llie eenier ol' a nioleeide and lel 

 llie cii-ele descrihed willi .1/ a> eenier, represenl llie seclion of llie 

 dislaiH-e splu're (!) ol' llial nioleenie willi llie paper. Now wc are lo 

 ealeiilale llie a\'era,u'e |)ressiire exercised dnrinu- a dnie t 011 a surface 

 eleinenl dn, llie center of which wc call the point /^ To this pur- 

 pose wc descrilie a cii-cle II with I* as ceiiler and willi a radius 

 'la and wc also consider die laniicnl plane in /' which we call LK. 



Two cases iiiav he dislinuMiished : 



1''^ The space within sphere II hiil outside s|)liere I and al llie 

 left of the tanu'ent plane (llie seclion (»f the >pace in (jiiesiion wi(li 

 the paper has heen hatcheil in the liunre) inav contain the center 

 of a inolecnie; if ihis is llie ca>e I* lies within lh<> di>|;iiice -pluTc 

 of that molecule. 



