The 19th of June, 1877. The weights of cotton-powder employed were 2 oz, 8 oz, 1 lb, and 2 lbs, in the Collinson rocket. ******************** XI. THE REV. JAMES MARTINEAU AND THE 'SPIRITS'. ******************** VOL. II. LONDON: LONGMANS, GREEN, AND CO. NEW-STREET SQUARE AND PARLIAMENT STREET ********************************************************************** FRAGMENTS OF SCIENCE: A SERIES OF DETACHED ESSAYS, ADDRESSES, AND REVIEWS. BY JOHN TYNDALL, F.R.S. Printed By Spottiswoode AND CO. 1879. All rights reserved. ******************** In the meantime, how many times I could not well received; and X, in a whisper, as he said, smiling, "and I think I may be roughly estimated at.