ALS signed “J. Ericsson,” one lightly-lined page, 7.75 x 10, February 20, 1860. Letter to an associate. In part, “Astounding news from Cuba…Owing to the force and regularity of the Caloric Mill 33 percent of the cane is saved that means 1/3 more juice is made…Rafael says that Caloric has fairly produced a revolution in Cuba.” In fine condition, with some mild toning, a couple small notations and minor edge wear. R&R COA.