12 books found
Vols. 1-69 include more or less complete patent reports of the U. S. Patent Office for years 1825-1859. cf. Index to v. 1-120 of the Journal, p. [415]
by Franklin Institute (Philadelphia, Pa.). Science Information Service
1969
by Philadelphia (Pa.). Councils. Select Council
1887
by Philadelphia (Pa.). Office of the City Controller
1924
by Engineers Club of Philadelphia
1920
by Philadelphia. City Controller
1897