J.R. Masterman Laboratory and Demonstration School Loading Map.... J.R. Masterman Laboratory and Demonstration School1699 Spring Garden Street - PhiladelphiaEvents 39.96341899999999 -75.16571959999999 Address 1699 Spring Garden Street Philadelphia PA 19130 United States Upcoming Events No events in this location Leave a Reply Click here to cancel reply. Name (required) Email (will not be published) (required) Website Comment