If solids are added together as dry or substantially dried solids, it is preferable to add {HEAD ~ a limited and controlled amount} of {TAIL ~ liquid} 
If solids are added together as dry or substantially dried solids , it is preferable to add { HEAD ~ a limited and controlled amount } of { TAIL ~ liquid }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL