Correspondence between the Right Hon. R. Wilmot Horton and a select class of the members of the London Mechanics' Institution [electronic resource] : formed for investigating the most efficient remedies for the present distress among the labouring classes in the United Kingdom : together with the resolutions unanimously adopted by the class : also a letter from the Right Hon. R. Wilmot Horton to Dr. Birkbeck, president of the institution, and his answer