^ ’f’ 
■- ■ a>i •’ 
- 2 - 
Tlie use of a microscope enables one to make a cleaner sweep 
in this respect, but I doubt whether it will be advisable to ship 
your microscope unless needed for some other purpose also. 
Trusting that your work is progressing satisfactorily, I am 
Sincerely yours, 
Cx/. 
