Cloud Seeding
CB's
In the 1960's I spent a lot of time cloud seeding in a Cessna 310.
We did two types of seeding, Cu & Stratus, the large Cu was base seeded,(rudder just under the base of the cloud) or seeded at the side of the anvil with a Very Pistol arrangement. The stratus seeding was carried out at OAT -5 centigrade.
The substance was Silver Iodide carried in Acetone. The Acetone was burnt in the discharger & this left the Silver Iodide nuclei in the air. The Silver Iodide nuclei is very close to an ice crystal nuclei & the thinking was that rain would result.
The flying was a great experience & did wonders for your flying skills.
Some spectacular views were to be had.