If you mean the University of Trier link I gave you, look in the upper right, at the end of the menu. Under "Ansichten" are "Blätterumgebung" and "Text" options. The former is the scan you're seeing, and the latter the OCRed version that you can paste into Google Translate. All the personal correspondence has converted.
Unfortunately, the political correspondence really only seems to be available in scans, so not even searchable or anything. I guess if I had to pick one, I'd pick the personal correspondence, but still. I'm starting to get interested in his political correspondence too. (Yesterday, for example, I found the letters where Fritz wrote to the guy in Hanover, shortly after becoming king, telling him to find Peter Keith and tell him to come home. I'm still a bit uncertain why Fritz said to keep the matter a secret?)
ETA: Correction, the first 20 of the 46 volumes of political correspondence have been converted to text! I just thought they hadn't because my first foray into the correspondence was the Peter III correspondence, which is in volume 22.
Re: Algarotti
Unfortunately, the political correspondence really only seems to be available in scans, so not even searchable or anything. I guess if I had to pick one, I'd pick the personal correspondence, but still. I'm starting to get interested in his political correspondence too. (Yesterday, for example, I found the letters where Fritz wrote to the guy in Hanover, shortly after becoming king, telling him to find Peter Keith and tell him to come home. I'm still a bit uncertain why Fritz said to keep the matter a secret?)
ETA: Correction, the first 20 of the 46 volumes of political correspondence have been converted to text! I just thought they hadn't because my first foray into the correspondence was the Peter III correspondence, which is in volume 22.