Mungojerrie and Rumpleteazer male cat: "...they were plausible fellows..." However, Rumpleteazer is usually portrayed as female in the musical. In the original Broadway production, the person cast as Rumpleteazer doubled as another character, Etcetera. In smaller local productions, this double character casting still occurs. In addition, Rumpleteazer and Mungojerrie can be cast to double as another tertiary set of characters: the twins Tantomile and Coricopat. Three distinct versions of the "Mungojerrie and Rumpleteazer" music exist: the original London production's version has a slower tempo and more jazz-like sound, while the more common original Broadway version is upbeat. Andrew Lloyd Webber wrote a new
What Engineers Know and How They Know It What Engineers Know and How They Know It What Engineers Know and How they Know It: Analytical Studies from Aeronautical History (The Johns Hopkins University Press, 1990) () is a historical reflection on engineering practice in US aeronautics from 1908 to 1953 written by an accomplished practitioner and instructor. This period represents the dawn of aviation which was fraught with uncertainties and numerous paths to many possible worlds. The book captures two main conclusions from this period. The first order conclusion of this book is about "what engineers know." Five case studies from the history of aeronautical engineering are used