Ruling pens could also double as roach clips as well.
Anyone here, besides me, still have a carousel? And I'm not talking about the one that you see at an amusement park.
Re: surveying. I have a K&E (Keuffel & Esser) field book (loose leaf no less) with a plastic, red/white, rectangular "target" taped to the front cover. Inside is a plastic sheet with distances from side stakes for cross-sectioning on one side and trigonometric formulae and reduction to horizontal diagrams/explanations on the other.