The study concerns images of vibrating spermatozoa in the ejaculation of buffalo bulls from Bulgarian murrah breed through the method of Tchakarov and Natchev [1962]. obtained at 5 sec exposures. optimal for this particular species. The negative registration material has been developed with high-equalising developer by Windisch. https://www.spencertifieders.shop/product-category/karaoke-cds/