Early psychological researches
Scope and Contents
The booklet contains records of experiments carried out to test reaction times. There is a reference to a 'decapitated frog' under the heading 'Queries' two-thirds of the way through the booklet, showing that some (perhaps even most of) the experiments were conducted on animals, not humans.
Language of Materials
Various scraps of paper with brief pieces of writing on them are loosely inserted into the booklet, along with some carbon paper print-outs of data.