cluded tg make this report reasonably self-sufficient but for those desiring further detail, reports of the above projects should be consulted, (See References. ) The field work was performed under the supervision of Capt Carrol! L. Hasseltine, USAF. The equipment was designed and constructed and the records analyzed und r the supervision of Mr. E. A. Colson of Edgerton, Germeshausen and Grier. This summary report is bassd on reports received from both Capt Hasseltine and Mr. Colson. TR etn aw Ree ene me pA RN Rae En nee 9 etre emma mote sete ee eet neo Pacific during Operation Ivy as Project 7.6. Since the Ivy experiments can be considered a continuation of 7.1b Snapper, 7.2 Buster and Annex 1.12 Greenhouse, much information previously given is not repeated in this report. Enough material is in- Piney a The work under AFOAT-~1 Project Authorization B/117 for optics: measurements during Operation Snapper was extended by amendmentto includes measurements in the White PREFACE