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