\ eK © "Uy qi It is notaworthy that in 16 of the 24 examinations the spermatozoa numbered less than 10,000, especially, in 14 examinations they were below 1,000. he The nurber of spermatozoa at the time of ejaculstion: iis was caleulated from the cuantity of ejaculetion and the muncser of spermatozoa per unit volume of their spern, Tne total number of spermetozoa of a healthy Japanese adult is considsred to be 3 x 1of -- 5x 108 or unwards. It was in 7 of the 24 exerninations that value was shown to be ebove 3X 107, Mobility of spermatozoa. The nobility of spermatozoa im.ediately after sperm ej-culation was <exanined chiefly under the ohase contrast wicraoscope., * The rate of mobility was caleulated in accordance vith the Nishixawa method, by dividing the sreriatezsa into these sroups by 1, 3/4, 1/2,3) 1/4 and O respsctively, and putting tosether the product which resulted, aA sid - o at re oe 5 —*-,- cf = SPOUP, - OVin> forverd 2eviv sly px 1 oy 7 BYrCup, tr = > :.OViMZ Paw ne “gd 2ODMvar ad eT slowly ct “Fr ww 3 /.ir 3rd sroup, rotating 3 x 1/2 woh croup, rendvieting 3x l/h ~ = . ’ y —_ Le ft Stn croup, sernding still Rate of mobility ox 0 Total 3 ce > "St {re be