Electric Chronograph

Electric Chronograph by Knoblich of Altona. 1865. In 1865, T.R. Robinson purchased and presented to the Observatory this electric chronograph for registering transits proving of great value in increasing the accuracy of the work. The clock movement was altered by Grubb in 1868. As a specimen of the work, Robinson published in 1879 the "Places of One Thousand Stars observed at the Armagh Observatory" (see Trans. Roy. Dublin Soc., Ser.2, 1, 101, 1879).

Last Revised: 2009 November 18th