I arrived back home from Eindhoven yesterday evening, after a week of all things good and fibrey (or stringy). More than a hundred of spindles were spun upon, masses of tablets turned, waffles and chocolate eaten, large quantities of coffee and tea consumed, and laughter and fun abounded.

The Textilforum was everything I had hoped and wished for: A meeting place for craftspeople and scientists, a place to chat and exchange knowledge and personal experiences with different historical techniques, to network and have fun together, a place to do some shopping for textile-crafts-related things and tools that cannot be found just everywhere, and an opportunity to have some nice, juicy bits of science that requires more than just one or two skilled craftspersons. So overall, a complete success, and I am sure that every visitor to the Forum also went home with something new and delightful learned.

For the experiment, I had the joy and privilege of working together with fifteen wonderful spinners to generate a really large dataset that will help a lot for researching spinning and spindle whorls in the future. This dataset and lots of number-crunching from it will probably keep me on my toes for the next few days and weeks, but the data already looks very, very promising. The first results were already presented to the spinners and lecture audience on Saturday evening, and more results are the topic of my talk at the liveARCH conference in Hungary in October. A good reason to set to work on all the cops of yarn and questionnaires!

I think that the red digits of numbers 9, 10 and 11 are already burned into my retina from weighing and packing about 300 portions of wool. And making little paper documentation slips for packing with the spun threads is not as tedious as writing each by hand, but still... change spindle type. change date. save as. print as pdf (two pages). change spindle type. change date. and so on. repeat with changed session and wool. That's somehow... mind-numbing. (But I'm finished now, and only need to print out the .pdf files.

Add to this the fact that I have decided (half-last-minute) that it would be nifty to make a statistic of how all the whorls turned out, and that it would be good to have a more accurate weight for all the plastic bags with wool in them, and voilà! there I will sit weighing things again. Once I've made it into town and bought some appropriate scales, that is.

Otherwise, not much has happened - I'm still thinking and preparing for the Forum and the experiment, while inbetween trying to take care of the last things that have stacked up during my holidays. And as usual, things always take longer than they ought to - and I'm sorry for whining that much, right in front of your eyes, right on your screen...

Since yesterday afternoon, fourty plywood discs in two different sizes and thicknesses are peacefully lying on a heap together, completing my selection of experimental spindle whorls. Thank goodness for the invention of power tools and "circle cutters"! Though even with that multi-watt support, it took me a while of fiddling with the large plywood sheets, the cutting gadget (a very cheap tool and accordingly fiddly to use) and the drill in its stand before I found out how to best cut the discs. But in the end, the archaeologist prevailed!

Now all the hard bits of the preparation are finally finished, and the whorls have turned out not to be perfect, but at least very good, and absolutely sufficient for the experimental purposes. So whew! The power of trial runs and solid calculations (with a huge lot of help from André Verhecken) is proven again.

A lot of the wool is already portioned and packaged, and today I'll take care of the rest of packaging before finishing the plywood with a light sanding around the edges and then... glueing the spindle whorls and spindles together.

This is something I would never do under ordinary circumstances. Who would want a spindle that can't be equipped with a different whorl, after all? "Those folks" back in the middle ages certainly didn't need glue to keep their spindle whorls on the spindle, the double-conical form was enough.

But since I am using chopsticks as spindle sticks (totally non-medieval, just like the plywood and the modern glue for assembling these), and since the plywood needs some glue to keep on the stick, and because I just want to make sure that none of the whorls slips off during the experiment, glue it is.

After the spindles are assembled, there's not much left to do for the experiment - preparing the documentation, writing down my notes for the "prep talk" before we start and packing all the things needed for transport to Eindhoven, no more. And well that this is so, since the experiment will start on Tuesday morning next week.

I'm still weighing and packaging wool, preparing spindles and preparing "starter yarn" for the spinning experiment, so the living room is quite taken over by the huge box of unpacked wool and the boxes with wool in plastic bags. Thankfully, once the air is out of the bags and they are sealed, they are pretty slim and thus quite manageable. I think I've never weighed and portioned off so much wool in my entire life!

While thinking about experiment details yesterday, I have also found a solution to keep all the spinning procedures as much the same as possible - which means to slide off the spun yarn after the first hour and start a new batch with the second wool type, again with an empty spindle and using a starter thread. And fortunately, I have also found something to slide the spun wool on.

There's still things left to decide, though. Should the spinning be done with the two wools in the same order every day? Say, first the fine and then the coarser wool, or vice versa? Is it better to do spinning of one spindle on one day, or is it better to change spindles and spin with two different ones, a new one after the first hour? Maybe this changing would diminish a big "getting-used-to" effect (but then, I'd guess that getting used to a new spindle won't take longer than five to ten minutes). Still, changing spindles would give at least a bit of the need to get used to it back, especially since changing spindles in the experiment means a vastly different tool to work with. And it would give me enough time to slide each bunch of spun yarn off the spindle stick and onto its storage tube, weigh it and label it as necessary.

Details like these are what I find so very fascinating about archaeological experiments. Even if you take a very simple thing to find out about as the basis of the experiment, it will get down to details that might not seem much at first glance, but that might be making or breaking the whole thing.
Our experiment basic idea is quite, quite simple: Find out about the influences of the different factors in spinning with a hand spindle. There are only three main factors, the spinner, the fibre, and the spindle itself; but the latter already offers two influencing elements, its moment of inertia and its weight. The spinner's influence can only be estimated if all the other influences are well known, so we only need to find out about these. The approach to that is like in any laboratory work: If you want to find out what a specific value does, just change that value and nothing else. And that is exactly what we did in designing and calculating four whorls, starting with a "reference whorl" corresponding to an actual archaeological piece in both weight and moment of inertia. (This, by the way, was not easy - the calculating was, but trying to guesstimate the shrinkage of clay from wet to fired and developing a method to get whorls all alike each other did prove difficult.)

So now we have five whorls and two sorts of wool, fine and coarse - the only thing we need to do now is run the actual experiment, with up to twenty spinners each spinning ten hours altogether, one hour per fibre and spindle. And, of course, deciding which spindle goes into action when, and with which fibre, and in what order. And what to document, and when, and how (you can never document too much, but you can't write down something that you haven't thought about...). And how to label each test batch. And, and, and...

Which gets me back to the title of today's post: Experiments are Awesome! But they always seem to multiply their demands on time and brain cells. And they never end up as harmless as they seem at the beginning.