282 Transactions of the Society. 



have had some difficulty in obtaining for these experiments. He 

 tells me that since then he has been using a fairly thick solution of 

 balsam in this acetone for mounting films, serial sections, and small 

 objects dii'ect from absolute alcoliol, exactly as one does ordinarily 

 from xylol, and that he sent some of the medium for trial to various 

 laboratories in Glasgow with, so far, satisfactory results. 



