| 
316  Epldnations and Illustrations of the plan, Sc. 
to construct a microscope, to be paid for out of the funds for the 
purchase of apparatus, provided that a commission, appointed by 
myself, should find it capable of producing certain effects. ‘This 
proposition was accepted, and the result will probably be given 
to the Board at the next meeting. 
of | the institution. 'The Secretary of the Treasury readily agreed 
to the proposition that there should be added to the mineralogi- 
provided that the Smithsonian Institution would furnish one set 
of the instruments, and take charge of the direction of the ob- 
