A: Philadelphia, Pennsylvania, United States
Among the most comprehensive encyclopedias of printing published to 1871 was John Luther Ringwalt's American Encyclopedia of Printing co-published in Philadelphia by printer Robert S. Menamin and the editor, writer John Luther Ringwalt, and J.B. Lippincott. Though it drew, of course, on prior works, I cannot think of a more comprehensive single volume reference work on all aspects of printing and book production published in the English language prior to this date. The work appears to have been intended both for printers and for the interested public.
Many aspects of this work suggest that it was, at least partly, a labor of love. These include the very liberal number of fine illustrations, an example of embossed printing for the blind actually typeset by a blind typesetter, examples of watermarks, etc. I have attached images of some of the more unusual illustrations in the book as well as Ringwalt's long article on the pros and cons of mechanized typesetting--the most comprehensive summary of the situation in that challenging aspect of printing that I have seen published up to 1871. From his article on Brown's Patent Type-Setting and Distributing Machinery", a device that had been introduced in 1870, we learn that Ringwalt believed that reducing the cost of typesetting was a main desideratum for American book production. From p. 82 I quote:
"Type setting should be so cheap that publishers can print books and papers in this country, and sell them at the low prices that now obtain in England. A London house has printed the Pilgrims Progress, in clear type, on good paper, so that the book can be retailed for a penny. News and illustrated papers are sold in England at nearly proportionately low rates. We have not as yet, reached this point in this country, although in proportion to our population, there are more readers here than in any other nation on the globe. We want the means of supplying the demand for reading matter. The inventive talent of our country produced the steamboat, the cotton-gin, and the electric telegraph. Its fully equal to the production of the perfect type-setting machine, which shall rapidly and cheaply do the entire composition of the whole country. Nothing else so profitably suggests to the mind of the American inventors. We invite the press of the country to join in subscribing for a prize which shall be worthy the attention and competion of every skillful inventor in the country. The prize shall be less than half a million dollars; and, if the leading newspapers in the country can be induced to combine in such an offer, the Worlind will gladly head the list with $25,000 as its own subscription. To the successful man, who produces the called-for instrument, a quarter of a million dollars will galdy be given by the publishers of the country. The rest of the prize should be distributed to the second, third, fourth, and fifth best machine."
Information by Menamin and Ringwalt is found primarily in the successor encyclopedia of printing published in New York in 1894: American Dictionary of Printing and Bookmaking edited anonymously by Wesley Washington Pasko.