Below is the only known reference to the Law of Concretion by Alice A. Bailey (AAB) in her voluminous writings and those given to her by Djwhal Khul (DK). Links on these pages of the Laws of Alice A. Bailey are to the online books at the Lucis Trust website.
For a discussion of what AAB means by a “law” please see Alice A. Bailey – What is a Law?
I seek to deal with a very important point here, emphasising the close connection between Agni, the sumtotal of the life force of the logoic threefold personality, as He is seen at work on the mental plane (which closely concerns man), and that manifesting driving force or intelligent will which emanates from the cosmic mental plane. There is a very interesting series of correspondences to be worked out here and we might briefly indicate the lines to be followed in this connection by the ensuing tabulation:
The 5th cosmic plane
The cosmic mental.
The 5th systemic plane
The mental plane.
The 5th subplane of the physical
The 5th principle
The 5th Law
Fixation, the Law of Concretion.
The 5th Ray
The 5th round
The round of manasic attainment.
The 5th root-race
The Aryan. Mental development.
The 5th sub-race
The Teutonic and Anglo-Saxon. Concrete mind.
The 5th group of Devas
Fire Devas of the mental plane.
The 5th Manvantara
Three-fifths of the manasaputras achieve.
The 5th scheme
The Lord of concrete science.
The 5th Mahamanvantara (or solar system)
The solar Logos achieves His fifth major Initiation.
The 5th chain
Principal evolution—fire devas.
The 5th Hierarchy
The greater Builders.
Vibrations of fifth order