When James Watt, Scottish engineer of the 18th century, observed that steam as an economic force that replace the manual and animal force, began to develop the manufacturing of steam boilers could be used. Today, we have the biomass boilers, which are used in domestic as well as industrial areas. With the passing of the years, they were becoming an indispensable for every production process equipment and engineers were making them increasingly small, efficient and safe. The first boilers had the drawback that badly exploited the steam, so the first change they made was to introduce tubes, to increase the heating surface. If the tubes inside circulating gases or fire, they are classified them into firetube boilers, and if water that circulates is Watertube boilers are called. Then in 1844 were developed Lancashire boilers, composed by a long cloak of steel, usually 5 to 10 m. long, through which passed 2 tubes of large diameter called stoves and installing a combustion chamber at the entrance of each of them. This camera could be designed to burn gas, oil or coal.

The stoves were surrounded by water on the outside and the heat generated in the combustion chamber was transferred to the water. One disadvantage was that after repeated heating and cooling, are they impaired generating air infiltrations which front shot of the boiler, and at the same time decreasing its efficiency. About the year 1878 was designed type Cochran boiler whose main innovation was the introduction of horizontal tubes in a vertical cylindrical cloak through flanged tubular plates. This boiler was vertical and the smoke box was part of she bolted to one side. In 1934 the Cochran boilers reached an agreement to Kirke, inventor of the famous Sinuflo tubes, and launched a line of horizontal boilers recovering heat. They were very successful, ideal for generating steam from residual hot gases arising from the processes of industries gas and steel.

Now, to answer the first comment I’ll review concept by concept that wields in its foundation; clarifying that recognized when who writes me does so with intelligence, because even when shows be on the sidewalk in front of my opinions, does so with respect. Let’s see then what is accuses me: said me that I’m confused. Now I with the same right and the same respect he directed to me, I can say exactly the same thing to this reader: dear friend you are confused. Now to analyse the position of each party should be in a neutral position, leaving aside the fanaticism and sentimentality and analyze two positions to see who is right. What is the truth of this player or that I esgrimo? To demonstrate the above still analyzing the criticism that makes me: this man tells me that not angry me by telling me that the law of attraction is ecumenist. And I reply him not me anger, nor I got angry when they say that it is a Satanist. If that is why each one the adjective you want, can add you because if it is by revile can accuse a theory in a thousand different ways.

I.e. by my you can call the law of attraction as they please, the subject does not pass by there, but if used to do good or to do evil. There are fanatical in many religions that covered in his texts sacred kill people in the name of God and the Christians (I’m Christian) are no exception. In the middle ages burned alive women accused witches and these acts were supported by the Church. (). The Court of the Inquisition of the Catholic Church in the 17TH century condemned Galileo Galilei, for his claims that the Earth is not the center of the Solar system, but it revolves around the Sun.