This thesis is concerned with the examination of the glottalic consonants of Hausa, a Chadic language spoken in northern Nigeria, Niger, Cameroon, Togo and Ghana. The glottalic consonants constitute a set of phonemes in the language whose historical and phonetic properties merit further investigation. The study is laid out in three parts. Part one (Chapters 1, 2 and 3) is the historical section. Here, a general overview of the Hausa language is given. Also discussed are several specific points made by pioneers of the genetic classification of Chadic within Afroasiatic and the reconstruction of glottalic consonants in both Chadic and Afroasiatic. The discussion here is not new but presents a summary of the literature. Hausa native words that have glottalic consonants are compared with possible cognates from other related Chadic languages from West, Central and East branches of Chadic and also from other Afroasiatic languages. Part two (Chapters 4 and 5) of the study concerns the investigation of phonation types in general. Chapter 4 gives a short account of the larynx, the mechanism of the vocal fold vibration and classification of phonation types. Chapter 5 is devoted to a review of instrumental techniques used in voice measurement. Part three (Chapter 6, the instrumental section) presents and discusses the results of a detailed electro- laryngographic analysis of the activity of the behaviour of the vocal folds in the production of the glottalic consonants and their non-glottalic counterparts as observed in the speech of educated native speakers of the language. The chapter begins with a review of the literature reporting early instrumental and non-instrumental studies of the segmental phonemes of the language. This is followed by a description of the techniques used to record, display and annotate both speech pressure and laryngographic waveforms. Both qualitative and quantitative analysis of the waveforms are presented. The most important parameter in the quantitative analysis is estimated open quotient (OQ) derived from the Lx waveforms measurements of Fundamental Frequency, duration and Voice Onset Time are also given. The chapter concludes by presenting the results of the experiment: 1 OQ increases in anticipation of plain voiceless consonants, and is relatively high at the consonantal release; 2 OQ decreases in anticipation of laryngealized consonants including the glottal stop (for most speakers) and less sharply for the ejectives; 3 OQ remains approximately at the speaker's modal value for the plain voiced consonants; 4 The laryngealized segments tend to lower pitch at the left of the consonant; and 5 They also tend to be longer than their plain counterparts.

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The purpose of this study is to set forth the history of radio in Nigeria. Chapters explore the history of Nigeria, the history of Nigerian radio, and the present structure of Nigerian radio. In a final chapter, specific historical factors are isolated that have made Nigerian radio what it is today. The study concludes that the present structure of Nigerian radio is a direct product of the peculiar history of Nigeria as a former British Colony. Little can be done to solve the problems of Nigerian radio unless the problems of Nigeria itself are first solved.

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This study is directed towards the relationship between the economic environment in Nigeria and its indigenous private sector from 1960 to 1980. Nigeria practices mixed capitalism aided by the national government, foreign governments and international agencies. The 1972 and 1977 Indigenization Decrees were passed to eliminate foreigners from certain economic fields to be replaced by Nigerian citizens. The economic environment of Nigeria is less than suitable for the operation of modern business. Roads, telephones, telex services, electricity services, law and order and a few other critical underpinnings of business are inefficiently provided for in the economic system of the country. Despite the unfortunate economic environment Nigerian Entrepreneurs, especially the Ibos, have been particularly industrious. However, indigenous private enterprise in the country has not been especially successful.

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This study aimed to analyze variables that may be responsible for the successes and failures of the Nigerian military government's agricultural policies. Inquiry was conducted into the political and administrative apparatus utilized by the military for implementing agricultural policies. We also analyzed the usefulness and effectiveness of such policies and how they affect the general well-being of the Nigerian population. Agricultural policies such as The Green Revolution; Integrated Rural Development; Operation Feed the Nation; and the Land Use Decree were examined in the study. Data for the study came from both primary and secondary sources. Our findings revealed that although the military government's efforts at upgrading agriculture in Nigeria had been significant, the government spent less for domestic agriculture. There was also extensive bureaucratic corruption and poor technological orientation for rural farmers; the national bourgeois elements collaborated with multinational companies in diverting monies allocated to agriculture for other purposes. We offered extensive recommendations, including the need for effective leadership and the creation of a socioeconomic and financial environment necessary for the stimulation of agricultural production. We also recommended that further research be conducted seeking to find the reason why production levels in African agriculture have been so low. We offered propositions that could be hypothesized and rigorously tested in future research.

This study was designed to measure the firm's capacity to produce more output from a given bundle of inputs. That is, the nature of economies of scale that obtains in the manufacturing industrial aggregate. The data on which this study is based was obtained primarily from two sources: (1) The Fourth National Development Plan (1981-85) of Nigerian Publication; and (2) The 1979 issue of the Yearbook of Industrial Statistics published by the United Nations.