While engaged in the construction of Fort Adams, between 1829 and 1832, Professor Bartlett contributed to SiUimnn^s Journal a paper on " The Expansibility of Coping Stones," which has been frequently referred to by foreign writers. During his life in Washington (1832 to 1834), as first assistant to Chief Engineer (General) Gratiot, he had a great deal to do with the engineering on the Cumberland National road, and with fortifications all over the country. In 1840 he was ordered by President Van Buren, through his Secretary of War, Mr. Poinsett, to examine the European observatories, with a view to improving the course of instruction in astronomy, practical and theoretical, in the Military Academy. In this work he was absent from the country about five months, and made many valuable aciiuaintances in Europe. On his return he submitted to the War Department the report of his work, the receipt of which was duly acknowledged. It is a misfortune, however, that this valuable report has in some way been lost. Frequent search has been made for it, but without success. It suggested a plan for an observatory to be located in Washington City.

In addition to these labors, the Professor, dui ing his long service at the Point, prepared several textbooks for the use of the cadets. In 1839 he published a " Treatise on Optics ;" in 1858, one on "Synthetical Mechanics," and another on "Spherical Astronomy," and in 1859 one on " Acoustics and Optics " and another on " Analytical Mechanics." Before finally retiring from his professorship he also published an article entitled " Strains on Rifle Guns," which will be found in the Memoirs of the National Academy of Sciences, Volume I. It was also separately published. All this shows the years of his life at West Point to have been busy and productive.