We have been able to find only two articles on the gross staining of cartilage in addition to those already reviewed.1 A modification of the Lundwall method by Moreira da Rocha2 referred to the staining of cartilage by methylene blue (methylthionine chloride, U.S. P.), toluidine blue, methyl violet, methyl green and safranin. Staining of joint cartilage was referred to only by implication; staining in the closed joint was not discussed. The author concluded that "no matter the stain used, its electivity for staining and its stability are in direct ratio not only to the maturity of amorphous ground substance of cartilage but also to its quantity." Thus it is found that adult hyaline cartilage will stain better and more strongly than embryonal cartilage of any type or adult cartilage of elastic or fibrous type. Da Rocha stated that this method of studying cartilage is better than desiccation or