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Published online by Cambridge University Press: 14 August 2015
The Taurids, Geminids and Quadrantids represent meteor streams existing at different stages of stream evolution. This can be inferred from the duration of their activity, more than a month for Taurids, a few days for Geminids and only a few hours for Quadrantids. The structure of the streams can be deduced from a study of the variations in incident flux of shower meteors and their mass exponents as a function of solar longitude. This paper is an attempt to deduce such structure from recent observations in India combined with data available for these showers from the early years of this century (Lovell 1954, Olivier 1960, Rao et al. 1975,1976, Webster et al. 1966).