GeoHistory Resources

Purchase Image Reproduction

Plan (alternate image), Sheet No. 2. Isodynamic lines at time of maximum velocity of ebb, surveyed in May, June & July 1886.

We're sorry, reproductions for this item are currently not available through our online ordering system. You may still in most cases order reproductions by contacting the holding institution directly.

PHILADELPHIA STREETS DEPARTMENT, SURVEY AND DESIGNS BUREAU

Frank Morelli
Survey Bureau Manager
Philadelphia Streets Dept.

Phone: (215) 686-5540
Email: frank.morelli@phila.gov

Plan (alternate image), Sheet No. 2. Isodynamic lines at time of maximum velocity of ebb, surveyed in May, June & July 1886.

Original size: 0 x 0 in. (estimated)