The Constitution of 1876 remains in force. Unlike the 1869 constitution, the 1876 constitution generally reflected public opinion in Texas at its time of drafting. While still in force, the 1876 constitution has been amended hundreds of times. Since 1876, 216 new sections have been added to the constitution, while 66 of the original sections and 51 of the added sections have been removed. The Texas Legislative Council’s Amendments to the Texas Constitution Since 1876 (http://www.tlc.state.tx.us/docs/amendments/Constamend1876.pdf) details the changes to the 1876 constitution over the past almost 150 years.
Constitution of the State of Texas, Adopted by the Constitutional Convention, Begun and Held at the City of Austin, on the Sixth Day of September, 1875. Official. Galveston: Printed at the "News" Steam Book and Job Establishment. [1875.] Winkler-Friend 3638.