Considerations on the bill for a general naturalization : as it may conduce to the improvement of our manufactures and traffic and to the strengthening or endangering the constitution, exemplified in the revolutions that have happened in this kingdom by inviting over foreigners to settle among us : with an enquiry into the nature of the British constitution and the freedom, or servitude, of the lower class of people, in the several changes it has undergone / [by Thomas Salmon].