In this manner, {HEAD ~ gravity} acting upon the contents in the inverted reservoir provides {TAIL ~ the contents} emptying force necessary to expel the contents 
In this manner , { HEAD ~ gravity } acting upon the contents in the inverted reservoir provides { TAIL ~ the contents } emptying force necessary to expel the contents
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH