a Scotch Farmer and Land-Agent. After travelling through Europe from 1813 to 1814, Loudon began to focus on the improvement of the construction of greenhouses and other agricultural systems. He ultimately developed a design for hinged surfaces that could be adjusted depending on the angle of the sun. Loudon also developed plans for industrial worker housing and solar heating systems. In 1815, he was elected a corresponding member of the Royal Swedish Academy of Sciences. Loudon established himself as a city planner, decades before Frederick Law Olmsted and others began to work. His vision for the possibility of long term planning for London's green spaces was illustrated within his work, Hints for Breathing Places for Metropolis published in 1829. He envisioned city growth being carefully shaped and circulation influenced by the inclusion of green belts. In 1832, Loudon established the design theory entitled Gardenesque. In this style, attention was given to the individual plant and placement in the best conditions for them to grow to their potential. Nineteenth century thought was punctuated by the belief that gardens should not mimic nature, so Gardenesque offered a solution by introducing exotics into gardens and basing layouts on abstract shapes. Loudon was instrumental in the adoption of the term landscape architecture by the modern profession. He took up the term from Gilbert Laing Meason and gave it publicity in his Encyclopedias and in his 1840 book on the Landscape Gardening and Landscape Architecture of the Late Humphry Repton. Architecture Sir Howard Colvin noted that, although Loudon did not regard himself as a practising architect, there is evidence that in his early days as a landscape gardener he did occasionally act in that capacity. His architectural thinking and his inclinations towards the Gothic style may be found in his A treatise on forming, improving, and managing country residences. A handful of architectural works – now largely lost – are associated with him. In 1806 he altered the exterior of Barnbarrow (Barnbarroch), Wigtown (burned 1942). However, his principal architectural work appears to have been Garth (Guilsfield), near Welshpool, Montgomeryshire, begun in 1809. His scheme for Garth was in what Colvin termed a "crudely Gothic" design. The scheme was illustrated in his Observations on laying out farms in the Scotch Style, but in execution the designs were modified by the patrons, Richard and Charlotte Mytton. The house was demolished during the winter of 1946–7. At Hope