Relay Oscillator with a Switch on the Capacitor

I added a switch to the capacitor. Project 8, Relay Oscillator with Capacitance. From"Make: Electronics" 2nd Edition by Charles Platt,

I built this circuit from the book and then added a switch to the capacitor. I think the end result is quite cool. I also like the

This is my first post here. I am a beginner who works at the Artisan's Asylum in Somerville, MA. Thanks to Mike and Andrew for their assistance.

Make: Electronics 2nd Ed, Project 8+