He wanted to enable students to distinguish between the root of Hebrew words in the Bible and any associated prefixes or suffixes.
أَمَّا ٱلْبَادِئَاتُ وَٱللَّاحِقَاتُ فَطَبَعَهَا بِحُرُوفٍ مُفَرَّغَةٍ .‏