This manual ( written at Stanislawskij style as memories of pupils of an immaginary class that reprhesents ALL the pupils the author got in more than 20 years of experience) is a very usefull pushing to deep our position about Public Speaking. It anyways outpoints the hystorical background of that art, starting from antique roman Rhetorica to join the behavioural sciences of today. The offering of a sampling of the research of the great Psychosociolohyst Robert Krauss of Columbia University ( whom to we owe total debts of thankfulness) complete the draft of giving a suggestion to improve our skills to communicate.