Â鶹´«Ã½

Letter: Canon fodder

Published 22 June 2011

From Brian Parker

One wonders what ecclesiastical diet is responsible for the proposal to use a “high-powered propane canon as a sound source” for mapping caves (4 June, p 26).

Dartmouth, Devon, UK

Issue no. 2818 published 25 June 2011

Â鶹´«Ã½ issue 2818 cover

Sign up to our weekly newsletter

Receive a weekly dose of discovery in your inbox. We'll also keep you up to date with Â鶹´«Ã½ events and special offers.

Sign up
Piano Exit Overlay Banner Mobile Piano Exit Overlay Banner Desktop