These essays have been stepping stones on my path to the completion of my fourth book, The Equations of Urban Design, and have appeared on my blog www.wmhosack.blogspot.com and at various other receptive sites such as Linked-In and Facebook. The first book and its second edition, Land Development Calculations, were published by McGraw-Hill in 2001 and 2010. The third book, The Science of City Design, was self-published in 2016. My last book, mentioned...