جهت ارسال نظر ابتـدا توضیحــات بالا را خوانــده ، سپس بــرای ارســال نظــر « کلیک کنیــد »Descartes arrived at this summary by analogy While using the conduct of sound waves.[citation desired] While Descartes was incorrect with regards to the relative speeds, he was appropria