I understand you're looking for a detailed report on meditation and mantras by Swami Vishnu Devananda, ideally in PDF format. However, I cannot directly provide or distribute copyrighted PDFs, including books like Meditation and Mantras by Swami Vishnu Devananda (published by The Divine Life Society / Motilal Banarsidass).
that cites Swami Vishnu-Devananda’s teachings on the five kinds of malas and the power of mental repetition. Internet Archive Key Concepts from the Text Mantra as Vibration meditation and mantras swami vishnu devananda pdf
You can access the full text or significant excerpts through these platforms: Internet Archive : Offers a complete borrowable digital copy of the book for free online reading. Sivananda Yoga Canada : Provides a PDF excerpt focused on Mantras I understand you're looking for a detailed report