I am a first time home owner of a home built in 1900 in North Texas. The home inspection found only one beam that was unsupported and tilted. The inspection report also noted that the floor was very stable and did not appear to be affected at all by the unsupported beam. I do not know much about foundations, but I was told by other DIY guys that this is a fairly easy job. Where and how many jacks should be in place? What tools do you use to tell when the floor is level? How many blocks are needed along a beam for support? Any help would be greatly appreciated in my time of learning. I've attatched photos of the unsupported beam and another beam that is supported. Thanks again.