Data recording panel for experimental programmes - provides for deletion or alteration of data during programme run

摘要

Panel is used for the recording of data for an experimental programme on which the data mentioned may be deleted or altered during the run of the programme and with the writing surface of the board subdivided by horizontal lines into a number of sections. The lines are formed as grooves which when viewed in cross section transverse to their length have a shape ensuring that the angle between the bottom of a groove and it's lower edge is acute. In addition several vertical grooves are provided which cut across the horizontal grooves. The grooves contain a water resistant material and the angle between the bottom of one groove and it's upper edge is obtuse. Used e. g. in collecting data for domestic animal breeding experiments etc.