Protochloride of tin has been lately proposed for this purpose from the property that it possesses of dissolving the earthy salts that are produced from the evaporation of the water employed in steam boilers. The protochloride of tin when subjected to the influence of water is changed into a soluble acid salt which dissolves the earthy salts. By the addition of about 2 lbs. of protochloride to a cubic yard of water evaporated, the formation of deposits and incrustations in tubular and common boilers is prevented. Herr Von Parmewitz, the inventor of the process for making wool from pine trees, has recently presented to the King of Prussia specimens of paper made of the same material. Another ingenious individual, at Gielsdorf, has also made paper from the red pine, which is so white and good as to be fit for writing or drawing, and needs no sizing because of its resinous quality.