Talk:Los Alamos Primer

How was it printed/typed?

The article says the primer was "printed". What does this mean exactly? I think the article should say. Who actually typed it? How exactly was it printed? In the PDF https://upload.wikimedia.org/wikipedia/commons/9/9c/Los_Alamos_Primer.pdf it looks like it was typed, but not on an ordinary typewriter, because some of the words are in a sort of bold font, e.g. the word "it" is often in a sort of bold font, that I thought typewriters don't have, on page 2 of the primer. Also on page 2, line three, the word "minimum" seems to have smaller spaces between the letters than the adjacent words. And there is quite a bit of handwritten writing as well. How was this reproduced? I don't think photocopiers had been invented. Polar Apposite (talk) 22:54, 26 July 2023 (UTC)

Mimeograph and spirit duplicator (often called ditto) were common at the time, and even after xerography was invented, the cheaper methods were commonly used. Both look like they are typewritten, the former in black ink, and the latter usually in purple ink. When I was in school, we got a lot of worksheets from spirit duplicators. Gah4 (talk) 01:10, 27 July 2023 (UTC)

On page xi it says Mimeographed. Gah4 (talk) 05:15, 27 July 2023 (UTC)