BACTERIOLOGICAL EXAMINATIONS 111 



by gently wiping with filter paper, after which a little absolute 

 alcohol is dropped on to the section. If any crystals of bichloride 

 of mercury are noticed they may be removed before staining by 

 immersing the slides for a few minutes in equal parts of Gram's 

 iodine solution and water and then washing out the iodine with 

 alcohol. 



