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