Showing posts with label weird science. Show all posts
Showing posts with label weird science. Show all posts

Sunday, January 25, 2009

This little light of mine


A project I have been working on involves oil lamps. I have looked everywhere to find inexpensive versions of biblical types of clay lamps, they're out there, just not cheap enough for what I need in the project (read: over 150 lamps).

In my search I found out information on oil lamps of old. Anciently all it took was a small lump of clay, rolled into a ball and then flattened, pinch up one side and curl up enough of the other side to make a well and there you go. Because olive oil has such a high flame point, a puddle of (olive) oil will rarely burst into or sustain a flame, but dip 100 percent cotton cloth, or wick into the oil and light it and poof, a flame. One could make a lamp that would give enough light to walk by, read with, or make their way through dark streets or rooms with a simple little lamp.

The more clay the better design of the lamp. Make a larger well (like the one in the photo) or even throw a pot onto the wheel and design a symmetrical, almost perfect, bowl for the oil. Adding a spout and a handle and you were living large. Typically the oil reservoir was filled via a opening in the top center of the well, making it more stable and less likely to spill.

Since the oil would not burst into flame on its' own, the length of the flame was determined by the length of the wicking material. Draw out more or less and the flame takes its' direction. The vessel stays cool to the touch, only near the flame does it warm.

So with my newly acquired knowledge I decided to see what I could make. The small, a little smaller than three inches long lamp above, took an extremely small amount of clay and five minutes to produce. After curing, I took a length of pure cotton, cut it about a half inch wide and four inches long, twisted it and threaded it through the hole. I poured in about three tablespoons of oil and let the cotton wick soak it up for a minute or two then lit the end. It was a great little light! I was surprised at how bright the flame was and how much light that tiny vessel put out.

Plans are now for me to see if I can grab a pound of clay and make a few more and set them aside for those times when the lights really go out! Let's hear it for ancient technology!

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Friday, March 21, 2008

Natural Dye Easter Eggs


Aren't they pretty?

All you need are eggs, vinegar, alum, and your veggies! Chop the veggies, cover with water, bring to a boil. Add alum and boil 10 or so minutes. (My pot was large so I added 2-3 tsp.) Add vinegar (I did 2-3 Tbl.) and turn off heat and cool. Add eggs and bring to a boil again for about 10 minutes. Shut off and let the eggs cool in the liquid.

I strained the liquid and put it in a smaller bowl and let the eggs cool and dye for a few hours.

My colours were a tad different than on the video, who knew? I still think they turned out cool.

The one up front is more periwinkle than blue or lavender (whole beets), the ones with the stripes and scrolls were supposed to be red, but came out more rust (red cabbage), the sage and olive greens came out fabulous and quick! (red onion, no alum, vinegar) Bright yellow (yellow onion with turmeric powder) were also very fast, almost immediate. The tutorial says you can get green from spinach, um no, not in my house. They came out perfectly white. grrr.

I made the stripes by using electrical tape, and the scrolls by painting the eggs with rubber cement, which actually the longer it sat in the solution, the more it was eaten away...just a heads up.

All of the dyes were much more intense before I rinsed them in water and dried them. Tip: PAT them dry, if you rub, the dye rubs off to a pastel colour.

All in all this was a really cool and interesting project. I am not sure a mom with a couple of kids would want to do it though. LOTS of funky fumes from the veggies. Seriously bad ones from the cabbage...ack! Also it took a lot more time than I remember.

That said, it is MUCH better to use the natural than the chemical dyes, but there you go.

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Saturday, February 16, 2008

Weird Science!




Calcium Chloride is used for all kinds of things. Literally hundreds of uses from controlling dust to an ingredient in Cadbury Chocolates! But who knew it looked so pretty in the afternoon sun?

Bristol Dry Lake is near Amboy, CA in the Mojave Desert. As Thor and I drove past the enormous beds I was impressed with the extremely bright sparkle of the pre-processed mineral. It shown like glittery new fallen snow. The photos truly do not show the view we had.




The basic process is this: Find or create a flat level surface on the land. Flood said parcel with a good dose of plain ol' water and wait. After a bit of time the calcium chloride will rise to the top, crystallize and then it's scraped off and taken to the plant for processing and diversification. There are specific plains that have been squared off and made more efficient for the processing equipment. The day we drove through they were recognizable, but dwarfed in beauty by what Nature did all by herself.



Seriously, this landscape was absolutely gorgeous! It went on for miles and miles! It was especially grand because we caught the whole lake bed directly after the latest storm and the whole of it was soaked! Crystals covered the bed for as far as the eye could see, and shimmered in the sun with a bright white against the ice blue of the water and the deep blue sky.

The fragile crust flaked and chipped, and also had veins here and there. Along the edges of the lake,near the mountains and roadsides, where the land rises just enough, the gravel and grit keep the water and crystals from working their magic.

However, Nature finds a way to keep beautifying herself and even in the pebbles of an arid desert road grow sweet delicate flowers!

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