micro organisms and disease an introduction to the study of specific micro organisms microorganisms 48 micro organisms and disease chap now having filled the required number of test tubes and flasks with the required quantity of fluid i subject these seriatim to boiung by means of an ordinary test tube ft fig a beaker containing a number of culture tubes plugged with cotton wool holder i hold them above a very small flame until the fluid boils and keep it so boihng for from half to one minute during this process of boiung the cotton wool is only slightly pulled up an re4hh4.jpg from سکس اسب کوچک با جنده micro sis in hot mom son comil a View Photo