JF Ptak Science Books Quick Post
There's a LOT of artistic license in this title, but I like the idea of these acoustical plans as containers of what things sounded like in the halls and auditoriums that no longer exist. This is a big leap of faith given that the work that went into these images was conducted before the first truly scientific/mathematically rigorous architectural acoustics existed. But I like tot think of them as reconstructions of sound in a particular environment. The drawings are also beautiful, inn their way.
Image source: Theodore Lachez, Acoustique et Optique des Salles de Reunions, printed in Paris in 1879. This is the second edition, with 116 text illustrations in the 518pp--these are almost entirely images of plans or elevations of music halls (for the study of seating and the room's acoustics, etc.). This edition also contains sections on the acoustics of "sales de debats parlementaires" and an examination of the "singular and curious" acoustics of the new Paris opera house.
The book is for sale on the blog's bookstore; and/or you can have a look at it in full text online, here, at Google Books: https://books.google.com/books?id=MjoIAAAAIAAJ&pg=PA315&source=gbs_selected_pages&cad=3#v=onepage&q&f=false