What does ADSCRIPTI GLEB7E mean?

ADSCRIPTI GLEB7E meaning in Law Dictionary

Slaves whom served the master of the soil, have been annexed into land, and passed along with it with regards to had been communicated. Calvin. In Scotland, as late because the reign of George III., laborers in collieries and salt works were bound on coal-pit or salt work with that they had been involved, in a manner similar to that of the adscripti associated with the Itoznans. Bell.