Darina MLADENOVA (Institute of Balkan Studies, Sofia) Bulgarian lexical isoglosses: Geographical distribution and chronology Prior linguo-geographic analysis of phenomena on various levels of the linguistic system has established the existence of several types of macro-divisions of the Bulgarian linguistic territory: (a) East vs. West; (b) Northeast vs. West and South; and (c) North vs. South. Each of these macro-divisions may have a variant featuring non-contact correspondence of the Southwestern areal (or parts thereof) and the Eastern, Northeastern or Northern areals, respectively. Systematic research based on a large corpus of maps may lead to the discovery of other types of macro-divisions. Another line of current linguo-geographic research targets the in-depth analysis of the established macro-divisions. This paper aims to show on the basis of the North vs. South division the perspectives and issues of such research in relation to the lexicon. The sequence of steps to be taken is as follows: (1) Clarify the origin and chronology of the lexical phenomena that characterize a given areal. A stratification of the relevant phenomena along such lines can be realized in the Bulgarian context more easily through comparison with the other Balkan and Slavic languages than by tracing back the history of the Bulgarian terms as documented in texts. For the latter option we at present lack the necessary basis, which is satisfactory only regarding the Old Bulgarian period. The questions that such a stratification intends to answer are: (a) what kinds of lexical items characterize the areal; and (b) when did the areal emerge and until when was it active. (2) Having stratified the relevant lexical characteristics, we have to turn to the configuration of the areal itself. A key role here plays contemporary computer-based technology that allows the creation of combined maps by overlaying the areals of each lexical stratum. The obtained profiles of lexical strata will show their cores and peripheries. The question that arises in this regard is whether any patterns can be observed. For instance, does the profile of Proto-Bulgarian elements differ from that of Greek or Proto-Slavic elements and, if so, how does it differ? (3) It is necessary to employ all resources to reconstruct the past configurations of areals. There are several sets of data that can be illuminating in this regard and conclusions should be drawn on the basis of their cross-referenced indications: (a) Data from localizable early Modern Bulgarian texts, written between the seventeenth and the nineteenth centuries; (b) Data from the dialects of Bulgarian settlers in Romania and Bessarabia, which reflect the Bulgarian state of affairs of the eighteenth and the nineteenth century; (c) Toponymic data; (d) Areal configurations of derived and related words. Working with data sets (c) and (d), one can expect more profound insights if the place names (or the derived and related words) are synchronic with the basic term. Thus, the comparison of the West and South areals of нога ‘leg; foot’ and its derivatives подножки, ножùца ’(leather) footwear string’, ногàвица, ногàвец ’pant leg’ leads to valuable conclusions because it can be proven that both the basic term and its derivatives have Proto-Slavic chronology. (4) A characteristic feature of an areal are its subdivisions, some of which are spillovers of other macro-divisions. It can be argued that micro-divisions are superimposed on macro-divisions rather than dependent on them. This hypothesis will be checked through comparison of macro-divisions’ internal segmentations.