Catalog cards were 2 by 5 inches (5 cm × 13 cm); the Harvard College size.

Can I use a card index for note taking?Yes, you can certainly use a card index for note-taking. Card indexes have been a popular method of note-taking for many years and can be very effective. Here are a few tips to get you started:Choose the right size of card index: Card indexes come in various sizes, so choose one that is comfortable for you to handle and store.Use cards of the same size: Using cards of the same size ensures that they will fit into your index box or file and that they will be easy to handle.Choose a system for organizing your cards: You can organize your cards alphabetically, by subject, by date, or any other system that works for you.Use one card per idea or topic: To keep your notes organized and easy to find, use one card per idea or topic.Keep your notes brief and to the point: Use brief notes that summarize the key points of your topic. This will make it easier to review your notes and find the information you need.Review your notes regularly: Review your notes regularly to keep the information fresh in your mind and to make sure you haven't missed anything important.Overall, a card index can be a very effective method of note-taking, as long as you develop a system that works for you and use it consistently.

Yes, you can definitely use a card index for note-taking. In fact, many people find card indexes to be a useful and convenient tool for organizing and storing notes. Here are some tips for using a card index for note-taking:Choose a system: Decide on a system for organizing your cards. You could organize them alphabetically, by topic, by date, or by any other method that works for you.Choose the size of cards: Choose the size of cards that works best for your needs. Common sizes include 3" x 5", 4" x 6", and 5" x 8".Use one card per idea: Write one idea or piece of information on each card. This will help keep your notes organized and easy to reference.Include keywords: Include keywords on each card to make it easier to find relevant information later.Use dividers: Use dividers to separate different topics or sections in your card index. This will help keep your notes organized and easy to navigate.Carry it with you: A card index is a portable tool, so you can take it with you wherever you go. This makes it easy to take notes on the go and to refer to your notes when you need them.Overall, a card index can be a useful and efficient tool for note-taking, especially if you prefer a physical, tangible way of organizing and storing information.

he spoke of the ‘historian’s credo’ that ‘the factscrubbed clean is more eternal than perfumed or rouged words’ (Marcus, 1957:466).17

Moreover, card indexes give further form to Bruno Latour’s meditations on writing: ifLatour described writing as a kind of ‘flattening’ of knowledge, then card indexes, likevertical files, represent information in three dimensions, making ideas simultaneouslyimmutable and highly mobile, and the smallness of ideas and ‘facts’ forced to fit onpaper slips allowed for reordering (Latour, 1986: 19-20).

However, the miniscule size of ‘facts’ did not neces-sarily reflect Deutsch’s adherence to any theory of information. Instead, it indicated hispersonal interest in distinctions of the smallest scale, vocalized by his motto ‘de minimiscurat historicus’, that history’s minutiae matter.

Bruno Latour has reflected, information is more malleable when it is not too large(Daston, 2002; Latour, 1986: 19).

The ‘size’ of facts served a dream of information recombination, and was served bythe card form. Other advocates of Zettelkasten like Johann Jacob Moser (1701–1785)remarked that fairly small facts meant the mass of information was broken down to itsindividual components and thus could be constantly reshuffled in a ‘game of cards’(Krajewski, 2011: 53-5).

We know we’re supposed to write one idea per page/card. What constitutes an “idea”? How do I identify what a good idea is? What does an idea that fits on one card feel like?

Filing is a tedious activity and bundles of unsorted notes accumulate. Some of them get loose and blow around the house, turning up months later under a carpet or a cushion. A few of my most valued envelopes have disappeared altogether. I strongly suspect that they fell into the large basket at the side of my desk full of the waste paper with which they are only too easily confused.

Thesheets must always be of equal size, or at least of equal height in order not to get stuck or beoverlooked when manually searching for sheets or adding them.