_Ad_ ... addition ... front addition ... _ante_-room.... _Ante_ ... antecedent ... _con_sequent.... _Con_ ... converse ... _in_verse.... _In_ ... _Inter_ ... interject ... _ob_ject.... _Ob_ ... obligation ... _post_poned obligation.... _Post_ ... post-office ... _pre_payments.... _Pre_ ... predilection ... _pro_pensity.... _Pro_ ... produce ... soil products ... _sub_soil.... _Sub_ ... subordinate actor ... _Super_. And, similarly, we can deal with any Series in =Grammar=, or elsewhere. 1. Do my pupils ever find any difficulty in correlating the series as they may find it? 2. What training must they have in order to do so? 3. Is any time misspent in trying to discover a non-existing relation? 4. What are the eleven Latin prepositions here given? 5. How are they usually learned? 6. Is time gained thereby? (2) The other kind of Series is where the words, facts, or things _must_ be memorised as given. The seven primary colours are given as they occur in nature, thus:--Violet, Indigo, Blue, Green, Yellow, Orange, Red. The unconscionable word VIBGYOR has been given as a means, through the initial letters of the colour words, to enable us to remember those words, and ROYGBIV to enable us to remember the Series backwards. To such a pass are educators driven when they lack my Universal Method of cementing Extremes. We know the Series both ways if we Correlate the words, thus: _Violet_ ... let go ... _Indigo_ ... indigestion ... "blues" ... _Blue_ ... blue sea ... sea green ... _Green_ ... green corn ... ripe corn ... _Yellow_ ... yellow fruit ... _Orange_ ... orangemen ... fights ... blood split ... blood-red ... _Red_. ORDER OF THE ENGLISH SOVEREIGNS.