Law of Population was a treatise written  as a response to works on population growth by an English cleric and what?
Law of Population Law of Population (1830) was a massive treatise written by Michael Thomas Sadler as a response to Thomas Robert Malthus's works on population growth, notably "An Essay on the Principle of Population" (first edition 1798). In his essay, Sadler refutes Malthus' conclusions regarding the geometric growth of populations and proposes that the growth of populations is a far less worrisome menace. At this period population growth had become a "political bugbear" throughout England, much in a way comparable to modern day fears of terrorism or Cold War fears of nuclear war.
An Analysis of the Laws of England An Analysis of the Laws of England is a legal treatise by British legal professor William Blackstone. It was first published by the Clarendon Press in 1756. A Fellow of All Souls, Oxford, and a lecturer there, on 3 July 1753 Blackstone announced his intentions to give a set of lectures on the common law — the first lectures of that sort in the world. A prospectus was issued on 23 June 1753, and with a class of approximately 20 students, the first lecture series was completed by July 1754. Despite Blackstone's limited oratory skills and a speaking style described by Jeremy Bentham as "formal, precise and affected", Blackstone's lectures were warmly appreciated. The second and third series were far more popular, partially due to his then unusual use of printed handouts and lists of suggested reading. These show Blackstone's attempts to reduce English law to a logical system, with the division of subjects later being the basis for his "Commentaries". The lecture series brought him £116, £226 and £111 a year respectively from 1753 to 1755 — a total of £ in 2017 terms. Seeing the success of this publication, Blackstone was induced to write "An Analysis of the Laws of England", a 200-page introduction to English law, which was first published in 1756 by the Clarendon Press.