MacLaurin's Physical Dissertations is a significant collection of works by the Scottish mathematician Colin MacLaurin, who is known for his contributions to the development and expansion of Newton's work in the fields of analysis, geometry, and gravitation. This publication offers a first-time translation of his lesser-known essays that address topics such as the collision of bodies and tides. The collection is complemented by a translation of MacLaurin's MA dissertation on gravity, which provides insights into his early studies of Newton's principles. The essays are of interest not only to mathematicians and physicists but also to anyone interested in the historical developments in these sciences. The combination of geometry and analysis that MacLaurin employs in his works demonstrates the depth and complexity of his thoughts and offers valuable perspectives on fundamental physical concepts.