-iii- Page 



VII - Periodic Seeding . . 55 



New Mexico Work 55 



Eastern Work. 59 



Later Periodicity . . • • 59 



VIII - Hurricanes & Forest Fires 61 



Hurricane Study. 61 



Operation Red 64 



IX - Co-operation with Other Projects . 67 



Pineapple Research Institute, Honolulu, Hawaii 67 



Milliken & Far well, Mobile, Alabama .... ....... 67 



United Fruit Company, Honduras 68 



"New York City Water Shortage. 68 



Commercial Seeding in the West 69 



Work of Other Governments ........................ 71 



X - Conclusion ..................................■■•••••'• 73 



Over-all Results 73 



Widespread Weather Modification 73 



Modifying Orographic Clouds 74 



Producing Regions of Ice Nuclei. 74 



Modifying Stratiform Clouds ..................... 74 



Modifying Supercooled Ground Fogs .............. 75 



Protection of Aircraft. 75 



Modifying Orographic Thunderstorms ............ 76 



Modifying Towering Cumulus .................... 76 



Preventing Hail 76 



Apparent Limitations 76 



Fair Weather Cumulus .......................... 77 



Warm Ground Fogs ............................. 77 



Drought • • • • 77 



Convergence ..................................... 77 



Controversial Aspects 77 



Legislation 79 



Reference Literature 83 



Appendices 



I - Alphabetical List of Personnel 85 



II - Flight Tests. ......... 87 



III - Ground Operations .......................... 93 



IV - Bibliography of Reference Literature ......... 95 



