whereby a signal is transmitted from said first liquid container to said second liquid container by {TAIL ~ way} of {HEAD ~ the liquid}, and 
whereby a signal is transmitted from said first liquid container to said second liquid container by { TAIL ~ way } of { HEAD ~ the liquid } , and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH