REPORT 



OF THE POLYTECHNIC ASSOCIATION. 



The Polytechnic Association of the American Institute report: 



That in conformity to the circular issued by the Board of Mana- 

 gers, a number of articles were submitted to the Association for 

 examination. 



These several articles were referred to the mechanical and chemi- 

 cal sections of the Association. 



The accompanying reports were made by the sections to a meet- 

 ing on the 25th day of January last, and were adopted as the report 

 of the Polytechnic Association to your Board. 



Respectfully submitted. 



SAMUEL P. TILLMAN, 

 Chairman of the Polytechnic Association. 



February 19, 1863. 



