I just went on a train ride in Lincoln NH. The train's engine is run on a wood boiler. The conductor said he burns half a cord a day. I asked if he uses pine and hardwood or just hardwood ( I could see him throwing hardwood in so I knew he was using hardwood). He said they only used hardwood, said that pine didn't have enough BTU's and that it threw way to many sparks. With all the burn pine don't burn pine talk we have here i thought i would post it.